A link card for the Neo Geo Pocket? Very lucky find, my friend!
Here's my personal faves:
Action:
Metal Slug 1st Mission
Metal Slug 2nd Mission
Sonic the Hedgehog Pocket Adventure
Dark Arms: Beast Builders
Fighters:
Rockman: Battle & Fighters
Fatal fury: First Contact
King of Fighters R-1
King of Fighters R-2
Samurai Showdown!
Samurai Showdown! 2
SNK vs. CAPCOM: Match of the Millennium
Puzzle games:
Bust-a-Move Pocket
Shanghai Mini (this is a Taipei, Mahjong Solitaire, Tile Matching game)
Magical Drop
Crush Roller