The winner is "Let's Meet Sonic", which got 3 votes. "Monster Party" got 1 vote. The next matchup is animated crossovers with live action shows. This time it's between "Halloween Night At The Museum" (Ultimate Spiderman & Jessie) and ScoobyNatural (Supernatural & Scooby Doo).
Can we talk about how a French home video company had an opening logo consisting of an animated Groucho Marx set to disco music? I especially like the Fender Rhodes solo during the second half, even if it's just the warning message.