Hmm, depends on what you consider "cool" haha. I thought of Groundshaker cuz I do compound names a lot, but since this trio is based on gods/spirits, maybe Cernunnos would be cool (Celtic god, then would name the other two on other gods of nature on the mythos). They are actually based on specific Japanese gods (for Landorus it's Inari) but I'm pretty sure those names have been done a ton so I'm not as into those names.