Here is the full list of all 8 Minigame Madness achievements.
Reach 5 stars in Sumo Shamble!
Reach 5 stars in Explosive Exchange!
Reach 5 stars in Disco Disorder!
Reach 5 stars in Frantic Forces!
Reach 5 stars in Chaotic Chambers!
Reach 5 stars in Blazing Bullets!
Reach 5 stars in Summit Scramble!
Reach 5 stars in Bounty Battle!