According to this NES Tetris game manual that Twitter user vecchitto dug up, these are the names of the various Tetris blocks. And here I’ve been calling them L and backwards L blocks, when they’re actually Blue and Orange Rickys! I should have known. Hero and Smashboy are definitely the best names though, and I’m pretty sure a Cleveland Z is when you fart under the covers and then pretend to be asleep.
Thanks to my dad, who agrees now we need to use this knowledge to beat Tetris type B level 9-5 on the Game Boy to see the whole band play and the shuttle launch.