Arcade Classic 1: Missile Command - Asteroids (Game Boy - 1995)
Cover art (Source: mentioned by the artist on Instagram)
Arcade Classic 4: Defender - Joust (Game Boy - 1995)
Cover art (Source: mentioned by the artist on Instagram: 1, 2)
Dragon Hopper, AKA Jump Dragon / ジャンプドラゴン (Virtual Boy - unreleased)
Cover art for the US version (Source: mentioned by the artist on Instagram)
Earthbound, AKA Mother 2 (SNES - 1994)
Cover art for the US version (Source: mentioned by the artist on Instagram)
Panic Bomber, AKA Tobidase! PaniBom / とびだせ！ぱにボン (Virtual Boy - 1995)
Cover art for the US version (Source: mentioned by the artist on Instagram)
Red Alarm / レッドアラーム (Virtual Boy - 1995)
Cover art for the US version (Source: mentioned by the artist on Instagram)
Syvalion / サイバリオン (???)
Unused artwork (Source: mentioned by the artist on Instagram)
Tetris Attack, AKA Yoshi no PanePon / ヨッシーのパネポン (SNES, Game Boy - 1996)
Cover art for the US and European versions (Source: mentioned by the artist on Instagram)
Arcade Classic 1: Missile Command - Asteroids
Arcade Classic 4: Defender - Joust
Dragon Hopper
Earthbound
Panic Bomber
Red Alarm
Syvalion
Tetris Attack