>>51849479From a marketing perspective, it makes no sense.
Gen 8 is almost over and Cinderace will soon be forgotten like 90% of the starters, while Pikachu is still going to be around for Gen 9.
Remember the anime is a glorified ad, nothing more.
Cinderace's shillmon status isn't quite as strong as the likes of Charizard, Greninja and Lucario.