Underfalls Undertale AU

Well this is one AU of Gravity Falls

and UNDERTALE

Well this AU talk abou Gravity Falls and UNDERTALE  together


Dipper and Mabel and Bill Cipher go to Undertale one crossover

But i'm dont know this AU

In this Image

Is one Crossover


But is this image

ITS ONE AU

Well i'm so confused but you need view GravityFalls and Play Undertale Both are soo good well thats it! Thanks for view this guys =3