Transmutation Bug: Bill rejects two identical Event Greninja (Poseidon Form)

Server: Silver

Description of the bug:

When attempting to use Bill's Transmutation machine in Cerulean City with two Greninja of the exact same event variant (Poseidon Form), Bill rejects the process and states: "The appearances of these Pokemon do not match. Remember, they need to be of the same species and have the same appearance!"

Both Pokemon are identical in species and appearance (both are Poseidon Greninja). It seems the system fails to recognize that both share the exact same event sprite/form.

Pokemon Details:

1. First Greninja:

- Level: 36

- ID: 117202223

- OT: Jlinah

2. Second Greninja:

- Level: 100

- ID: 95185573

- OT: Jeremyii6

Please look into this issue and fix the form recognition for this event variant. Thank you!