I remember when I was 4-7 I was OBSESSED with the chipmunks. Like, obsessed. My Mom took me to Walmart and I saw a shirt that had Alvin on it and I was like 'I NEED THAT SHIRT MOM BUY IT NOW DESU!1!!!11!!' and it was huge so my mom washed it and it shrunk
This actually looks like that mutated Alvin that Dr. Frankenstein turned Alvin into in revenge for his civilizing his wonderful monster. The toonified Alvin looked and acted weird , wreaking demented havoc all over , causing chaos & confusion ,like a mindless maniac ! One of the last films done before the studio shut down.
Still, the Chipmunk Adventure was an excellent swan song.