Here is the full list of all 19 Super Hop 'N' Bop ULTRA achievements.
Play 100 Matchs
Play 50 Matches
Unlock Fatboi
Play a Timed Match 10 Minutes Long or More
Play a Timed Match 30 Minutes Long or More
Play a Timed Match 60 Minutes Long
Unlock the Final Platform
Play King of the Hill With 99 Lives
Play 10 Matches
Play Capture the Flag With 99 Points
Play a Deathmatch With 99 Lives
Win King of the Hill With the Loser not Having Scored Once
Win Capture the Flag With the Loser not Having Scored Once
Win a Deathmatch With the Loser not Having Scored Once
Win a Timed Match With the Loser not Having Scored Once
Unlock Twinkle
Play 1 Match
Unlock Mr. Skeltal
Unlock the Space Base