One of the most interesting features in Gold and Silver is the Time Capsule. After opening, it allowed players the opportunity to trade over their beloved fighters from Generation I games, or trade their new ones to these games with moves they previously couldn't have. There are two very obvious technical limitations to this, of course, which are detailed below.

How to Open
The Time Capsule cannot be opened until the player visits Ecruteak City Pokemon Center for the first time and meets Bill. After he has fixed it, you are free to use the machine to trade Pokemon of any level that meets the below requirements. Don't forget to pick up an Eevee from Bill in Goldenrod City after!

Restrictions
Just like in Star Trek, players can't visit the capsule if they're going to be messing with the timeline. Here are the restrictions:

- no Johto Pokemon or eggs can be transferred. - no new moves on old Pokemon can be traded over.

This means that you can't trade over your Lugia to awe Kanto with, nor any of the other Johto Pokemon. Not even pre-evolutions and evolutions of Kanto Pokemon. There are, of course, glitches that circumnavigate these restrictions, but we won't get into that here. The time steam must be preserved.

To be able to trade over Pokemon with new moves, you must first delete them. This is done either by writing over the offending move with a TM or level-up one, or taking the Pokemon to Blackthorn City's move deleter to have it erased manually. The latter method is the only way Pokemon who have learned Whirlpool will forget it.

It is perfectly find to send back a Pokemon with a move it couldn't learn before but was available in Generation I. An example of this is Blastoise with Ice Punch, or Machoke with Karate Chop. Be warned however, moves like Karate Chop that changed types in Generation II will not retain these changes in Generation I.

Items
When you trade Pokémon over from Pokémon Green, Red, Blue or Yellow, you may notice that the Pokémon has got an item attached to it. Some of these items are quite common, but others can only be obtained by trading the Pokémon. The item may also vary depending upon the game it is being sent from.

No.	Pic	Name	Type	Base Stats						Red/Blue Item	Yellow Item
				HP	Att	Def	SpAtk	SpDef	Spd
#001		Bulbasaur フシギダネ		45	49	49	65	65	45	Bitter Berry
#004		Charmander ヒトカゲ		39	52	43	60	50	65	Bitter Berry
#007		Squirtle ゼニガメ		44	48	65	50	64	43	Bitter Berry
#010		Caterpie キャタピー		45	30	35	20	20	45	Berry
#011		Metapod トランセル		50	20	55	25	25	30	Berry
#013		Weedle ビードル		40	35	30	20	20	50	Berry
#014		Kakuna コクーン		45	25	50	25	25	35	Berry
#016		Pidgey ポッポ		40	45	40	35	35	56	Berry
#017		Pidgeotto ピジョン		63	60	55	50	50	71	Berry
#019		Rattata コラッタ		30	56	35	25	35	72	Berry
#020		Raticate ラッタ		55	81	60	50	70	97	Berry
#021		Spearow オニスズメ		40	60	30	31	31	70	Berry
#022		Fearow オニドリル		65	90	65	61	61	100	Berry
#023		Ekans アーボ		35	60	44	40	54	55	Berry
#024		Arbok アーボック		60	85	69	65	79	80	Berry
#025		Pikachu ピカチュウ		35	55	30	50	40	90	Berry	Light Ball
#026		Raichu ライチュウ		60	90	55	90	80	100	Gold Leaf
#027		Sandshrew サンド		50	75	85	20	30	40	Berry
#028		Sandslash サンドパン		75	100	110	45	55	65	Berry
#029		Nidoran♀ ニドラン♀		55	47	52	40	40	41	TM43
#030		Nidorina ニドリーナ		70	62	67	55	55	56	Berry
#031		Nidoqueen ニドクイン		90	82	87	75	85	76	TM43
#033		Nidorino ニドリーノ		61	72	57	55	55	65	Berry
#035		Clefairy ピッピ		70	45	48	60	65	35	MysteryBerry
#036		Clefable ピクシー		95	70	73	85	90	60	Leftovers
#037		Vulpix ロコン		38	41	40	50	65	65	Berry
#039		Jigglypuff プリン		115	45	20	45	25	20	Polkadot Bow
#040		Wigglytuff プクリン		140	70	45	75	50	45	Gold Berry
#041		Zubat ズバット		40	45	35	30	40	55	Berry
#042		Golbat ゴルバット		75	80	70	65	75	90	Berry
#043		Oddish ナゾノクサ		45	50	55	75	65	30	Berry
#044		Gloom クサイハナ		60	65	70	85	75	40	Berry
#046		Paras パラス		35	70	55	45	55	25	Berry
#047		Parasect パラセクト		60	95	80	60	80	30	Gold Leaf
#048		Venonat コンパン		60	55	50	40	55	45	Berry
#049		Venomoth モルフォン		70	65	60	90	75	90	Gold Leaf
#050		Diglett ディグダ		10	55	25	35	45	95	Berry
#051		Dugtrio ダグトリオ		35	80	50	50	70	120	Gold Berry
#052		Meowth ニャース		40	45	35	40	40	90	Berry
#054		Psyduck コダック		50	52	48	65	50	55	Berry
#055		Golduck ゴルダック		80	82	78	95	80	85	Gold Leaf
#056		Mankey マンキー		40	80	35	35	45	70	Berry
#057		Primeape オコリザル		65	105	60	60	70	95	Gold Leaf
#058		Growlithe ガーディ		55	70	45	70	50	60	Berry
#060		Poliwag ニョロモ		40	50	40	40	40	90	Berry
#061		Poliwhirl ニョロゾ		65	65	65	50	50	90	Berry
#063		Abra ケーシィ		25	20	15	105	55	90	TM09
#064		Kadabra ユンゲラー		40	35	30	120	70	105	Berry	TwistedSpoon
#066		Machop ワンリキー		70	80	50	35	35	35	Stardust
#067		Machoke ゴーリキー		80	100	70	50	60	45	Berry
#069		Bellsprout マダツボミ		50	75	35	70	30	40	Berry
#070		Weepinbell ウツドン		65	90	50	85	45	55	Berry
#072		Tentacool メノクラゲ		40	40	35	50	100	70	Berry
#073		Tentacruel ドククラゲ		80	70	65	80	120	100	Silver Leaf
#074		Geodude イシツブテ		40	80	100	30	30	20	Berry
#075		Graveler ゴローン		55	95	115	45	45	35	Berry
#077		Ponyta ポニータ		50	85	55	65	65	90	Berry
#078		Rapidash ギャロップ		65	100	70	80	80	105	Silver Leaf
#079		Slowpoke ヤドン		90	65	65	40	40	15	Berry
#080		Slowbro ヤドラン		95	75	110	100	80	30	Gold Leaf
#081		Magnemite コイル		25	35	70	95	55	45	Berry
#082		Magneton レアコイル		50	60	95	120	70	70	Silver Leaf
#083		Farfetch'd カモネギ		52	65	55	58	62	60	Bitter Berry
#084		Doduo ドードー		35	85	45	35	35	75	Berry
#085		Dodrio ドードリオ		60	110	70	60	60	100	Bitter Berry
#086		Seel パウワウ		65	45	55	45	70	45	Berry
#087		Dewgong ジュゴン		90	70	80	70	95	70	Gold Leaf
#088		Grimer ベトベター		80	80	50	40	50	25	Berry
#089		Muk ベトベトン		105	105	75	65	100	50	Gold Leaf
#090		Shellder シェルダー		30	65	100	45	25	40	Berry
#092		Gastly ゴース		30	35	30	100	35	80	Berry
#093		Haunter ゴースト		45	50	45	115	55	95	Berry
#095		Onix イワーク		35	45	160	30	45	70	Bitter Berry
#096		Drowzee スリープ		60	48	45	43	90	42	Berry
#097		Hypno スリーパー		85	73	70	73	115	67	Gold Leaf
#098		Krabby クラブ		30	105	90	25	25	50	TM33
#099		Kingler キングラー		55	130	115	50	50	75	Silver Leaf
#100		Voltorb ビリリダマ		40	30	50	55	55	100	Berry
#101		Electrode マルマイン		60	50	70	80	80	140	Silver Leaf
#102		Exeggcute タマタマ		60	40	80	60	45	40	Berry
#104		Cubone カラカラ		50	50	95	40	50	35	Berry
#105		Marowak ガラガラ		60	80	110	50	80	45	Gold Leaf
#106		Hitmonlee サワムラー		50	120	53	35	110	87	Bitter Berry
#107		Hitmonchan エビワラー		50	105	79	35	110	76	Bitter Berry
#108		Lickitung ベロリンガ		90	55	75	60	75	30	Bitter Berry
#109		Koffing ドガース		40	65	95	60	45	35	Berry
#110		Weezing マタドガス		65	90	120	85	70	60	Silver Leaf
#111		Rhyhorn サイホーン		80	85	95	30	30	25	Berry
#112		Rhydon サイドン		105	130	120	45	45	40	Silver Leaf
#113		Chansey ラッキー		250	5	5	35	105	50	Lucky Punch
#114		Tangela モンジャラ		65	55	115	100	40	60	Bitter Berry
#115		Kangaskhan ガルーラ		105	95	80	40	80	90	Bitter Berry
#116		Horsea タッツー		30	40	70	70	25	60	TM33
#117		Seadra シードラ		55	65	95	95	45	85	Gold Leaf
#118		Goldeen トサキント		45	67	60	35	50	63	TM33
#119		Seaking アズマオウ		80	92	65	65	80	68	Silver Leaf
#120		Staryu ヒトデマン		30	45	55	70	55	85	TM33
#122		Mr. Mime バリヤード		40	45	65	100	120	90	Bitter Berry
#123		Scyther ストライク		70	110	80	55	80	105	Bitter Berry
#124		Jynx ルージュラ		65	50	35	115	95	95	Bitter Berry
#125		Electabuzz エレブー		65	83	57	95	85	105	Bitter Berry
#126		Magmar ブーバー		65	95	57	100	85	93	Bitter Berry
#127		Pinsir カイロス		65	125	100	55	70	85	Bitter Berry
#128		Tauros ケンタロス		75	100	95	40	70	110	Bitter Berry
#129		Magikarp コイキング		20	10	55	15	20	80	Berry
#130		Gyarados ギャラドス		95	125	79	60	100	81	Bitter Berry
#131		Lapras ラプラス		130	85	80	85	95	60	Bitter Berry
#132		Ditto メタモン		48	48	48	48	48	48	Metal Powder
#133		Eevee イーブイ		55	55	50	45	65	55	Bitter Berry
#137		Porygon ポリゴン		65	60	70	85	75	40	Bitter Berry
#138		Omanyte オムナイト		35	40	100	90	55	35	Bitter Berry
#140		Kabuto カブト		30	80	90	55	45	55	Bitter Berry
#142		Aerodactyl プテラ		80	105	65	60	75	130	Bitter Berry
#143		Snorlax カビゴン		160	110	65	65	110	30	Leftovers
#144		Articuno フリーザー		90	85	100	95	125	85	BrightPowder
#145		Zapdos サンダー		90	90	85	125	90	100	BrightPowder
#146		Moltres ファイヤー		90	100	90	125	85	90	BrightPowder
#147		Dratini ミニリュウ		41	64	45	50	50	50	Bitter Berry
#148		Dragonair ハクリュー		61	84	65	70	70	70	Bitter Berry	Protein
#150		Mewtwo ミュウツー		106	110	90	154	90	130	BrightPowder
#151		Mew ミュウ		100	100	100	100	100	100	Bitter Berry