Have you ever beaten a 2000?

Yes, I beat many.

Yes

Only in bullet. I got him good.

I have done it in rapid ,bullet ultrabullet and variants

i have in antichess, atomic (on an alt), bullet, blitz, and racing kings

I have beaten a 1980 in normal chess,, and another 1900. and i mite have beaten one in racing kings.

I have beaten these people:

marchingcanine (2113)
Geraldosilva (2108)
chessperson (2044)
Prometheus957 (1949)
Igf (1903)

I mean I beat a 1945 i guess that counts?

I've beat titled players such as IM manitodeplomo, WFM Ellsyum, NM chess assist, FM nissousspou
and yes I have beat 2000 rated players many times

I beat 2200 without him berserk in hyper