Not by a longshot; it's more of a benefactor than the ideal thing to set it up. With a base speed of 85, and weakness to Weavile's Ice Shard (a priority move off of its physical stat) and Choice Scarf Typhlosion's Eruption, don't be surprised if it's the first Pokemon of the match to be KOed.So Cherrim isn't the best prep for Sunny Day?