The 1 Player Mode is a simple VS mode throughout the game. There are five different levels of difficulty, with each difficulty adding more characters as you go through. Playing through the story mode, you play as Ash Ketchum on his Pokémon journey with his 3 Pokémon, battling through Panel de Pon and trying to defeat your opponents. In total there are 16 stages, each of which increasing in difficulty and the Pokémon they change vary in with the difficulty



Stage 1: VS Gary

The first stage has you pitted against Gary Oak. This is your simple basic stage so it should be easy

Available in: Easy, Normal, Hard, Very Hard, Super Hard
VS: Gary Oak; Nidoran, Krabby, Growlithe
Stage 2: VS Brock

Next you're pitted against the gyms and as such, your first gym match is against Brock, the Rock Gym Leader

Available in: Easy, Normal, Hard, Very Hard, Super Hard
VS: Brock; Geodude, Vulpix, Zubat
Reward: Boulder Badge
Boulder Badge
Stage 3: VS Misty

Continuing the gym matches, you go against Misty, the Water Gym Leader

Available in: Easy, Normal, Hard, Very Hard, Super Hard
VS: Misty; Horsea, Psyduck, Staryu
Reward: Cascade Badge
Cascade Badge
Stage 4: VS Lt. Surge

Continuing the gym matches, you go against Lt. Surge, the Electric Gym Leader

Available in: Easy, Normal, Hard, Very Hard, Super Hard
VS: Lt. Surge; Raichu, Jolteon, Magneton
Reward: Thunder Badge
Thunder Badge
Stage 5: VS Erika

Continuing the gym matches, you go against Erika, the Grass Gym Leader

Available in: Easy, Normal, Hard, Very Hard, Super Hard
VS: Erika; Tangela, Weepinbell, Gloom
Reward: Rainbow Badge
Rainbow  Badge
Stage 6: VS Koga

Continuing the gym matches, you go against Koga, the Poison Gym Leader

Available in: Easy, Normal, Hard, Very Hard, Super Hard
VS: Koga; Venomoth, Voltorb, Golbat
Reward: Soul Badge
Soul Badge
Stage 7: VS Sabrina

Continuing the gym matches, you go against Sabrina, the Psychic Gym Leader

Available in: Easy, Normal, Hard, Very Hard, Super Hard
VS: Sabrina; Abra, Hypno, Alakazam
Reward: Marsh Badge
Marsh Badge
Stage 8: VS Blaine

Continuing the gym matches, you go against Blaine, the Fire Gym Leader

Available in: Easy, Normal, Hard, Very Hard, Super Hard
VS: Blaine; Arcanine, Charmeleon, Magmar
Reward: Volcano Badge
Volcano Badge
Stage 9: VS Tracey Sketchit

Pausing in the Gym Matches, you end up going against Tracey, the Pokémon Watcher from the Orange Islands

Available in: Easy, Normal, Hard, Very Hard, Super Hard
VS: Tracey; Marill, Venonat, Scyther
Stage 10: VS Team Rocket

Again pausing in the Gym Matches, you end up going against Jessie & James as in the animé

Available in: Easy, Normal, Hard, Very Hard, Super Hard
VS: Team Rocket; Weezing, Arbok, Golbat
Stage 11: VS Giovanni

Completing the gym matches, you go against Giovanni, the Ground Gym Leader

Available in: Easy, Normal, Hard, Very Hard, Super Hard
VS: Giovanni; Persian, Sandslash, Nidoking
Reward: Earth Badge
Earth Badge
Stage 12: VS Ritchie

After the Gym matches you end up against Ritchie, the rival similar to Ash

Available in: Normal, Hard, Very Hard, Super Hard
VS: Ritchie; Sparky, Zippo, Happy
Reward: Elite Opening
Elite Match
Stage 13: VS Lorelei

Going into the match against the Elite Trainers, you go against Lorelei, the Ice Elite Trainer

Available in: Normal, Hard, Very Hard, Super Hard
VS: Lorelei; Cloyster, Poliwhirl & Dewgong
Reward: Elite Medal 1
Elite Medal
Stage 14: VS Bruno

Ending the matches against the Elite Trainers, you go against Bruno, the Fighting Elite Trainer

Available in: Normal, Hard, Very Hard, Super Hard
VS: Bruno; Onix, Hitmonchan, Primeape
Reward: Elite Medal 2
Elite Medal
Stage 15: VS Gary

Finishing the matches full circle, you go against Gary but with evolved Pokémon

Available in: Hard, Very Hard, Super Hard
VS: Gary Oak; Nidoqueen, Arcanine, Kingler
Rewards: Very Hard Mode Unlocked
 
Stage 16: VS Mewtwo

The Final Match is against the Ultimate Pokémon

Available in: Very Hard, Super Hard
VS: Mewtwo; Bulbasaur, Squirtle, Pikachu
Rewards: Game Complete