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Alternating Energy Ball and Magical Leaf does less than Conkeldurr alternating TPunch and Low Sweep against both bosses. Also, in order for Bulba to match/exceed Conk's damage, moves like Leaf Storm, Petal Blizzard, and Solarbeam (non-rain) need to be used.
That is okay, I am more worried about Waterbolt Volley and Surf tbh. We could give Thick Fat from Mega Venusaur to Ludicolo to avoid the Blizzard spread.
Order changes: Have Smeargle use the Reflect A2. Our damage falls short 7 with you calcs barring Crits on non-Tkiss moves. Solution: M-Garde uses Swift A1 and HVoice A2