Tiff didn't know who Spark Kirby was even though he debuted in DeDeDe's Raw Deal.
The episode shows Sword Knight and Blade Knight in aprons cooking and helping out while Tuff is laughing at them.
She asked in both epsiodes that feature him. That was just a mistake made in the original, which the dub didn't bother to fix.
Spark Kirby returns.
The Slicer Dicer was originally named RyourigerZ, as a reference to MazingerZ (an animé robot).
I think this is the true debut of Spark Kirby because when he transforms Tiff asks Meta Knight what mode he is in.