Revert "Remove Seasonals temporarily"

This reverts commit 9a3577efa0f739df6d7235a260099f33a2a13afc as Seasonals weren't the source of problems.
Fake diff
It won't recognize the rename to ID style
Fix crash in Balanced Typechart mod
This fixes the issue introduced in bf5a747
Add May Mayhem team builder
Merge pull request #20 from Slayer95/master

Fix crash in battles