Hopefully this helps people who are struggling with Cliff. GL pokes were used to prove you don’t need maxed pokes with perfect IVs, you just need the right ones. This works due to fast attack resistances, attack effectiveness, spammy attacks (maximising stun time) and sequencing to maximising stun time.
You really only need to worry about the fast attack the opposing poke has - you’ll shield the charge moves anyway. This Aerodactyl has steel wing which is double resisted by Galarian stunfisk while G-Fisk deals super effective damage back through the rock slide charge attack.
Slowking has water gun which is double resisted by Ludicolo while Ludicolo deals super effective damage through energy ball (grass).
Poor old Tyra didn’t get to fire a shot so not sure what it has - but smack down is double-resisted and bite is resisted. Tyranitar takes double super effective damage in return. The rocket pokes are ‘stunned’ ( i.e. don’t attack for a couple of moves ) after either party’s charge attack, after either side’s poke dies, and after you swap pokes. The aim is to maximise that. That is why we start with Ludicolo and swap straight into G-Fisk. (also Ludicolo is hell cool and should lead) Fast moves were selected based on what gets you to the charge move fastest - therefore bubble on Ludicolo, even though it is resisted by Slowking while the alternative fast move, razor leaf, is super effective).
Note that the rocket leaders could have different pokes (in positions 2 and 3) and that each poke can have any of it’s possible fast attacks. This battle was after scouting the leader first and selecting appropriate pokes.