Someone has/had a YOSHIRA Pikachu from Nintendo Power.
This is just pure speculation, but look how the IVs match with the distribution Mew.
An example from a Pikachu raised from LV 5 to LV 24, with Mew IVs, the stats result are very close to the original photo, just by a few points of difference:
I suppose this Pikachu was made with the same Special/Mew Distribution Machine, they just changed the Pokémon, nicknamed it to PIKCHU and give them the moveset.