We do not currently know of any antonyms for Trololo.
The proper noun Trololo is defined as:
Eduard Khil's vocalized recording of the song "Я очень рад, ведь я, наконец, возвращаюсь домой (Ja očenʹ rad, vedʹ ja, nakonec, vozvraščajusʹ domoj)" and its accompanying music video, which has risen into a meme.