How I would make Katy harder in gen 9

My rule set:

1. IT HAS TO BE BALANCED (eg. first gym leaders will have worse move sets)

2. I can't increase the levels and call it a day

3. each gym will have +1 pokemon on their team

4. the only pokemon with EV's on their team is their Ace

Lets get started!

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1st pokemon: Nymble

Lv. 14

Ability: Swarm

Moves: Bug Bite (for STAB), Double Kick (To help deal with rock types) and Trailblaze (because it's a good move)

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2nd pokemon: Tarountula

Lv. 14

Ability: Stakeout

Moves: Bug Bite (for STAB), Circle Throw (to deal with rock types) and Headbutt (because it's a good move)

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3rd pokemon: Surskit

Lv. 15

Ability: Swift swim

Moves: Struggle Bug and Bubble Beam (for STAB) and Rain Dance (To weaken fire types and activate swift swim)

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Ace: Vivillon

Lv. 16

Ability: Compound Eyes

EV's: 100 SPA, 100 SPE

Moves: Struggle Bug and Gust (for STAB), Sleep Powder (For Sleep) and Draining Kiss (for recovery)

What do you guys think about by buffs to Katy?