After a good sales start in both the U.S. and Japan with 14 launch titles (a record at the time), subsequent low retail support in the U.S., lack of communication with third-party developers by SNK's American management, the popularity of Nintendo's Pokémon franchise and anticipation of the 32-bit Game Boy Advance, and strong competition from Bandai's WonderSwan in Japan, led to a sales decline in both regions.
- Baseball Stars Color
- Bio Motor Unitron
- Bust-A-Move
- Cool Boarders Pocket
- Crush Roller
- Dark Arms - Beast Buster 1999
- Dive Alert: Becky's Version
- Dive Alert - Matt's Version
- Dynamite Slugger
- Evolution: Eternal Dungeon
- Fantastic Night Dreams: Cotton
- Faselei!
- King of Fighters R-2
- The Last Blade: Beyond the Destiny
- Magical Drop Pocket
- Metal Slug - 1st Mission
- Metal Slug - 2nd Mission
- Neo 21 - Real Casino Series
- Neo Baccarat - Real Casino Series
- Neo Cherry Master Color - Real Casino Series
- Neo Dragon's Wild - Real Casino Series
- NeoGeo Cup '98 Plus
- Neo Mystery Bonus - Real Casino Series
- Neo Turf Masters
- Pac-Man
- Picture Puzzle
- Pocket Reversi
- Pocket Tennis Color - Pocket Sports Series
- Puyo Puyo 2
- Puzzle Bobble Mini
- Puzzle Link
- Puzzle Link 2
- Samurai Shodown! 2 - Pocket Fighting Series
- Shanghai Mini
- SNK Gals Fighters
- SNK vs. Capcom: Card Fighter's Clash - Capcom Vers
- SNK vs. Capcom: Card Fighter's Clash - SNK Version
- SNK vs. Capcom - The Match of the Millennium
- Sonic the Hedgehog - Pocket Adventure