Honestly not sure if you're joking around or not, due to the fact I don't really recognize you, but even in sun Cherrim is completely useless.
You are wrong, my friend.
Boosted by sun, Cherrim in sun has 90/87 attack/sp and 85 speed. Which makes it a good sweeper in lower tiers. And combine that with a boosted 117 sp df, it can function as a Special wall.
Solarbeam is the kill move of course, but Leech seed is just as effective in a different way. And then just give it a focus sash, so it can last one more turn, and you have an extremely formidable opponent.
But let's not get Off-topic here...
If you're using it in lower tiers with Sunny Day, there's many other better abusers like Eggy and Victreebell who are much better than it because they are much faster with Chlorophyll, and won't get outsped and OHKO'd by the many physical attackers that are faster than Cherrim.