Here is the full list of all 20 Diabolical Pitch achievements worth 200 gamerscore.
All worlds cleared in multiplayer mode
Use 200 Diabolical Pitches
Successfully catch 51 times
1,000 items acquired
2,000 dolls knocked down
All worlds cleared in single-player mode
Collect 30 types of baseball cards
Use Area Retry or World Retry 10 times
All types of Diabolical Pitch used including the Union Ball
Clear a world in multiplayer
Clear an area without using a Diabolical Pitch (Other than Extra Areas)
Kick away 10 dolls or more
7 triple sevens
Collect 500 coins or more
Clear an area without taking damage (Other than Extra Areas)
Area cleared with all dolls totally destroyed
Throw faster than 105 mph.
Collect 100 coins or more
Acquire all 64 baseball cards
Clear all worlds without taking damage from the first area until the end of the extra area