SNK Vs. Capcom: Card Fighters Clash is a card game created by SNK in 1999 for the Neo-Geo Pocket Color. It features many characters from both SNK and Capcom (Metal Slug characters included). SNK also made a expanded version, featuring new artwork and some new cards.
Metal Slug related cards
Backup: Eri, Tarma, Fio
Helps: Eri, Tarma, Fio
Ability: Enemy Chaser
Discards hand. All characters but him get 100 damage for each card.