Grim has about 4!! His origin arc in Sinnoh, follows his story from when he was a kid. His evil arc which goes from his time in Unova to when he eventually would lose his wicked winning streak. His redemption arc is next which is where his main design is borrowed from and is probably his most lengthy arc since it also shows him becoming a better person! And finally his end story which is just like an epilogue of his story and a time skip to him being a family man!