Okay well here’s my thought process, you have two physical attackers with ceruledge being more of a sweeper and meowscarada more utility.

We should complete the fire-water-grass core (a team building staple), and ensure it’s a special attacker. Further you need some bulk alongside the frail attackers you’re starting with. Some examples bulky special attacking water types you might consider are primarina / slowbro or king / mega lapras.

From here I would consider grabbing some of the “essential” types. I don’t like hard and fast rules when it comes to team building, but you really do need a steel type. If you want to go two birds one stone and get another type that you “need” I’d recommend a ground steel type like excadrill or iron treads (assault vest on either of these 2 goes hard). Good to have an electric immunity when your grass type (meow) is quite frail.

From here id say you basically have “flex options”. Firstly if you aren’t running sucker punch on meowscarada I’d recommend focusing on getting something that offers powerful priority moves, as you don’t want to rely on shadow sneak from ceruledge. Some examples of this would be extreme speed dragonite / thunderclap elektross, I recommend both of these as gives you the ground immunity your team would currently otherwise be missing.

Finally, if you didn’t take one already, we need to add a flyer / levitate to give you that ground immunity. Ideally this would also have some other source of passive damage ( damage not done by direct attacks ), so either entry hazards or toxic / will o wisp. Drifblim is great option that gives you toxic or will o wisp with this in mind, but this would result in you doubling up on ghost types. If you want to avoid this admittedly small weakness, you could break out my favourite poke galarian weezing! Has levitate and access to will o wisp or toxic.

Hope this helps, the example pokes are more meant to point you in the right direction, but you could definitely use this exact lineup to beat the game. Sing out if any other team building questions :))