Swap him in with two CD's left on your Sync Move, pop both of your "A World of Dreams" to get the most bang for your buck, Sync Move and then spam Psychic til the enemy is defeated.
And just from glancing it seems the best way to "play" Mew is one of three ways: I personally really like the way Mew is sounding. Battle theme: bgm_btl_common_boss Victory theme: bgm_btlrslt_normal Power: 126 | Accuracy: 70 | Gauge slots: 3 | Target: All opponents | Max uses: - Lv. Has a very small chance of leaving the target frozen. Power: 124 | Accuracy: 70 | Gauge slots: 3 | Target: An opponent | Max uses: - Move 4: Blizzard | Ice, Special, Pok茅mon Never misses during a hailstorm. Has a moderate chance of leaving the target paralyzed. Power: 116 | Accuracy: 85 | Gauge slots: 3 | Target: An opponent | Max uses: - Move 2: Thunder | Electric, Special, Pok茅mon Never misses when the weather is rainy. Mew Move 1: Fire Blast | Fire, Special, Pok茅mon Has a very small chance of leaving the target burned. Def, Speed, accuracy, or evasiveness at random when an attack is successful. Passive 2: Unfortuitous 9 Lowers the target鈥檚 Attack, Defense, Sp. Passive 1: Superduper Effective 1 Powers up moves that are super effective. Power: 250 | Accuracy: 0 | Gauge slots: 0 | Target: An opponent | Max uses:. 120 (5鈽� MAX) 520 / 320 / 320 / 320 / 320 / 320 Sync Move: Pok茅mon Professor Psychic | Psychic, Special, Pok茅mon No additional effect. Power: 0 | Accuracy: 0 | Gauge slots: 0 | Target: Self | Max uses: 2 - Pok茅mon - 1 - Mew Lv. Drastically raises either the user鈥檚 Attack, Defense, Sp. Power: 99 | Accuracy: 100 | Gauge slots: 3 | Target: An opponent | Max uses: - Move 4: A World of Dreams! | 鈥�, Status, Trainer Sharply raises the user鈥檚 Sp. Power: 0 | Accuracy: 0 | Gauge slots: 0 | Target: Self | Max uses: 2 Move 3: Psychic | Psychic, Special, Pok茅mon Has a very small chance of lowering the target鈥檚 Sp. Power: 57 | Accuracy: 0 | Gauge slots: 2 | Target: All opponents | Max uses: - Effect Tags: Sure Hit Move 2: X Speed | 鈥�, Status, Pok茅mon Sharply raises the user鈥檚 Speed. Moves - Move 1: Swift | Normal, Special, Pok茅mon Never misses. Professor Oak & Mew =Role: Tech | Type: Psychic | Weakness: Bug Rarity: 鈽呪槄鈽� | Scout method: Story Release Date: Friday, 14 February 2020 at 06:00:00 UTC This pioneering Pok茅mon Professor was an accomplished Trainer in his heyday and has since become an authority on Pok茅mon research.