The song is called "2-Tone Army" by The Toasters, but is credited as by the Moon Ska Stompers.
Pick up the masses.
Assume the crash position.
Hold on tight...
Take a deep breath...
(Seasons 1-2)...for a new kind of cartoon show!
(Seasons 3-4) ...for a cartoon cramaganza!
IIIIIIIIIIIIIT'S KABLAM! Where cartoons and comics collide!
Now to take you inside and turn the pages, here are your hosts, Henry and June.
[The music plays as Henry and June dance to it. Then they flip and the song ends.]