Do Kenya and Kirk's Shuckle gain the additional experience?

Question

Their OT is different from yours. However, they are gift Pokemon, not traded Pokemon.

Answer 1

If the OT/ID is different then it will gain additional experience. Source

Comments

"Pokémon for free will not be registered as the Pokémon's OT, except for in two instances - a Spearow given by Webster and a Shuckle given by Kirk, both in the Generation II games and their remakes." - What does this even mean?

Unsure about Kenya.