Duskull
No.355 · Requiem Pokémon
I've heard that the children of Hisui all begin to behave once they've been told the story of how this Pokémon roams about before the witching hour to spirit away misbehaving children.
No.355 · Requiem Pokémon
I've heard that the children of Hisui all begin to behave once they've been told the story of how this Pokémon roams about before the witching hour to spirit away misbehaving children.
No.721 · Steam PokémonMythical Pokémon
It expels its internal steam from the arms on its back. It has enough power to blow away a mountain.
Volcanion is the tallest, heaviest and strongest of the 2 on this date.
December 20 is day 355 of the year on a leap-year calendar. Divided by 366 that leaves a remainder of 355, and every Pokédex number leaving the same remainder belongs to this date. The lowest of them, No.355, is the one this page leads with.
The straightforward reading — 27 July becomes No. 727 — breaks down in November, where the numbers run past 1025 and leave those birthdays empty. Cycling through 366 keeps every date filled.