(Annual) Festive Unifier Siblings

Lore
"Hello! Congratulations, Hero! ...sorry, did I surprise you? I might have been too ecstatic..." "But it's just not right if we don't get excited, okay?" "Thanks for all the fun on this long journey! Keep praying for the everlasting fortune of Neotellus! Now, let's go celebrate! Happy 3rd Anniversary!"

Acquisition
Second stage of the card obtained through the 3rd Anniversary 60-Day Login Promotion. Has a total of 11 stages, the first 9 stages are: Additionally, players must evolve the 9th stage with (presumably) another card obtained through a ticket received on day 60 of the login promo. Depending on the card obtained from the ticket, either a normal or special final form is obtainable:
 * Festive Unifier Siblings (Stage 1)
 * (Jovial) Festive Unifier Siblings (Stage 2)
 * (Congrats) Festive Unifier Siblings (Stage 3)
 * (Fling) Festive Unifier Siblings (Stage 4)
 * (Savor) Festive Unifier Siblings (Stage 5)
 * (Annual) Festive Unifier Siblings (Stage 6)
 * ? (Stage 7)
 * ? (Stage 8)
 * ? (Stage 9)
 * ? (Normal stage 10)
 * ? (Special stage 10)
 * ? (Normal stage 11; final stage FIRE)
 * ? (Normal stage 11; final stage FOREST)
 * ? (Normal stage 11; final stage WATER)
 * ? (Special stage 11; final stage FIRE)
 * ? (Special stage 11; final stage FOREST)
 * ? (Special stage 11; final stage WATER)

Additional Info

 * 6th "60-Day Login Promotion" card.
 * First 3rd Anniversary gift.
 * First card to have a "special" form.