Sonic Boom (2014)

S2E39 The Haunted Lair

Convinced that his hideout is plagued by spirits, Eggman decides to sell it to Barker. Meanwhile, Sonic and Tails take on the challenge of demonstrating that there are no such things as ghosts. They embark on a series of hilarious attempts to uncover the truth behind the eerie occurrences and clear the air surrounding the mysterious lair.