Hi, just registered but I would like to ask if Coalossal is any good. I have been thinking about maybe adding Lycanroc since Coalossal gets 4 times damage from Water and Ground type moves. Thanks!
Coalossal can be used very well in double battles. One of the most used set is Gigantamax with steam engine and weakness policy. Use with another Pokemon that has access to surf, but won't do much damage, like weavile. Make sure to Dynamax first turn. Your moveset sounds good, and use a sp.def boosting nature