I wonder what kind of cores I can form around Obstagoon...
Hatterene seems like it would make for a good partner since it scares off Fighting-types and can whittle away targets that Goon can't OHKO, but neither is particularly fast. Dragapult might also be interesting; it can Baton Pass Dragon Dance boosts that Goon appreciates and switch into attempted Fighting attacks with its immunity. They both share a weakness to Fairy though so perhaps Corviknight would be a good third?
I'm excited to explore the possibilities! :>
DD+BP Dragapult would've been broken. Thankfully, and unfortunately, there's baton pass clause.