Hey, it's me, Simirror, from Kirby Super Star! Remember?
Well, let me refresh your memory: Kirby Super Star is a SNES game where Kirby gets to show off a bunch of cute transformations.
> REALLY
> BRINE
> TREE
> BATGIRLS 
> GIRT
> ALERTS 
> LASTED > TENET
> MAR > 
> FORT 
> BURGERS > TEN 
> ZONE > PRONE > WASH > OFFER > OTHER > EAVES > WAX > FLOWER > PLOD > GARBLE > EON > REIN > BLING > LOT > STAKE > LOWER
> ???
> ???Answer Checker:
Hints about abilities: WING doesn't change the number of letters in a string. PAINT does. CUTTER and HAMMER decrease the number of letters in a string. COOK and STONE increase the number of letters in a string. JET and COPY can change the number of letters in a string, but WHEEL can't. CRASH always outputs an empty string. PARASOL and SUPLEX are semantic transformations.
Okay but what about the metapuzzle part? Those treasures at the end are from the "Great Cave Offensive." You can use the individual puzzles' answer checkers to match up treasures and answers. One of Kirby's Super Star abilities is conspicuously absent from the examples above. Can you use that ability anywhere? With any text strings you have handy? Like the feeder answers?