How to evolve Thwackey in Cobblemon.
Thwackey evolves into Rillaboom when it reaches level 35.
Evolution line
What Thwackey needs
1 path
RillaboomLevel up
Level 35
Moves it learns on evolving
Drum Beating
These are offered the moment the evolution completes. Decline them and you have to relearn them later.
Is it worth it
Thwackey nowgrass420
Rillaboomgrass530
Base stat totals, from the Cobblemon 1.7.3 species files.