Thread:KrytenKoro/@comment-35109290-20180716165043/@comment-134861-20180719122942

"If it was being used as a reference before" --- yeah, I can see how it would look that way.

While the coding is basically interchangeable on wikia, that's actually being used as a note, not a citation. The main article only includes the ages/grades explicitly covered in the fiction itself, and all that note is meant to do is say "fun fact, this doesn't jive with reality".

"or at least mention they're "a grade higher" in high school"

This would literally be the kind of thing that would be acceptable, in the body of the article. "A year later" or "the next year", or something like that.

The infobox would still only include the ages/grades that have been explicitly stated -- to bring in the grades in tri 2, we would need something like "its been one year since the fight against Meicoomon", or more explicit than that, and for ages we would need to either finally get birthdays, or have "its been exactly X years since [last time ages were provided]".