(Mew ex) Bounce Back

Use Psychic Embrace to quickly power up Mew ex (helped by cycling road) and use bosses orders to switch in a very powerful attacker from the enemy and use crushing hammer to (hopefully) protect Mew. Copy it's attacks and KO it and then use puppet offering to get bosses orders back. Use echoing horn to get the Pokémon back (if it's basic), and use Boss orders to bring it to the active, and repeat. If you can't use echoing horn because the knocked out Pokémon was a stage 1 or 2, switch

Use Psychic Embrace to quickly power up Mew ex (helped by cycling road) and use bosses orders to switch in a very powerful attacker from the enemy and use crushing hammer to (hopefully) protect Mew. Copy it's attacks and KO it and then use puppet offering to get bosses orders back. Use echoing horn to get the Pokémon back (if it's basic), and use Boss orders to bring it to the active, and repeat. If you can't use echoing horn because the knocked out Pokémon was a stage 1 or 2, switch out the enemy second strongest attacker OR fight with gardevoir.

Some notable knockouts from mew ex include:

Giratina Vstar (one hit KO)

Lost Box: Copy Greninja and snipe 2 benched Pokémon for OHKO's. If there is manaphy, use Boss Orders. KO it.

Mew VMAX :Use Bosses orders on genesect V and use Techno Blast for a one hit KO.

Charizard ex: Boss Orders late game and use its own attack on it.

Miraidon ex: Use its own attack on it