Yes 1860 Munich, but they suck and I hope they rot for ever in division 2 they are the hated club for us, and of course Dortmund is a rival, not only because of their recent success, in the past about 1994-2000 we had similar contention with them, but in the end they failed and almost collapsed, they overestimated the costs in that time.
but we have the same issues with the whole league as juve in italy, they all hate us and noone support bayern except bayern fans, we only have the bayern fans, rest of germany hates us, even in international matches... I guess it's always like this for a big club when you dominate a league, it's a plausible result of superior and inferior.