Sonic Mania Adventures part 2 has arrived and introduces Miles “Tails” Prower to the series. Here is the episode synopsis:

Miles “Tails” Prower, at your service! When Sonic shows up to let Tails know about Dr. Eggman’s newest plot, a tremor rocks the beach. As some mysteries are solved and new ones begin, Sonic will learn that to succeed, sometimes all you need is a helping hand.

You can watch episode 1 here.