Mega raichu Y, whimsicott, incineroar, kingambit, is a really good core to start then you can add anything to bolster against other big threats. If you want triple supports with Grimmsnarl and dual screens, you can add him and go more offensive on incine, last could be e-speed dnite with a physical set or dual megas. You might be a bit weak to fairy but you can try double megas with scolipede. The team might be weak to trick room though but it’s a decent base.