Tall Diamond Boy
Tall Diamond Boy[note 1] is a minor character in Undertale. He appears in floor 3 of Hotland alongside Diamond Boy, in the entryway of the northern shooting puzzle after completing it.
Tall Diamond Boy is a tall, green monster wearing a striped shirt and blue pants. His head is diamond-shaped and is divided into four segments, the top-right and bottom-left of which are black. These segments shift positions whenever Tall Diamond Boy speaks.
Tall Diamond Boy thinks highly of Mettaton. He eagerly talks about his favorite moments in his shows, describing them using the trademarked "Mettaton Moment™".
Tall Diamond Boy explains that his favorite moment in Mettaton's shows is when Mettaton beats up heel-turning villains, even during quiz shows. When spoken to again, he mentions that he enjoys watching Mettaton try on a variety of different outfits, even during newscasts. If Mettaton is killed, he asks if Mettaton truly retired and hopes he can unretire.[1]
Tall Diamond Boy's explanations are a hint at how to gain ratings during the battle against Mettaton EX. The specific hint, "beats up the heel-turning villains", refers to the Heel Turn ACT that rewards rating points when the SOUL takes a hit.
During the True Pacifist Route epilogue, Tall Diamond Boy is excited at the prospect of watching other kinds of television before presuming that none of them are as good as Mettaton's show. He can be seen watching Mettaton's stage show in the True Pacifist ending credits.
Tall Diamond Boy makes an appearance in Chapter 2 of Deltarune. He resides in Sans's grocery store.
Artwork from Undertale's 5th anniversary. Tall Diamond Boy and Dress Lion are seen in the audience.
- ↑ Internally referred to as
spr_diamondtallboyin the game files andobj_diamondkidin the game object references (shared with Diamond Boy), but this character is not named in game.
- ↑
Did Mettaton retire...?
— Tall Diamond Boy
Can't he unretire...?