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 an 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.