Pokémon gameplay can be deep but it’s pretty impenetrable for a kid just playing the game on his own. Most kids will just use the biggest attack moves, and that’s absolutely fine for the difficulty of the single player story made last I checked.
I wouldn’t really want kids getting deep into an online community meta personally.
Even if the kids are just using the highest-attack moves and switching pokemon, that's still a deep game. That's the basics of "Pivoting" and "damage sponging".
Many pokemon have self-recovery moves (slack off, recover, etc. etc.). Even when I was 10, I knew that if my sponge took a hit, and recovered the damage faster than my opponent could deal damage, I'd force them to switch.
Set-up sweepers, hazards, status effects and ability combos get complicated for sure. Taunt vs Substitute, Prankster vs Dark, there's too much to memorize here. But kids don't need to reach that level to still have the importance of bluffing, reading, and predicting.
I wouldn’t really want kids getting deep into an online community meta personally.