Tag alias: too_many_pikachus -> too_many_pikachu

Tag alias: too_many_pikachus -> too_many_pikachu

Results:

• The word "Pikachu" is identical in singular and plural forms: one Pikachu, two Pikachu, three Pikachu. For some reason, that's how game characters talk.
• Real people often add a final letter -s when pluralizing. So we could as well have the -s version available, too.

Implicate too_many_pikachu -> pikachu as well.

Done, although this is an oddly specific tag.

just going to report that there's a minor typo in the implication too_many_pikachu -> piakchu instead of pikachu