|Main Weapon(s)||His fists|
|Ability/ies||To charge with super speed and make a tower under his legs|
|Vulnerable To||Being flipped over and jumped on|
|First Appearance||Super Mario Bros.: The Popstar Crossover|
|Latest Appearance||Super Mario Bros.: The Popstar Crossover|
It is a giant red castle with a yellow crown with no jewels, it has red hands and legs as well and a yellow nose similar to Mount Pajamajama (living being), it also has a door for a mouth unlike Mount Pajamajama (living being).
It first appears as a sentient being and a boss, after Mario and the crew accidently awoken the Reddie Castle, it attacks them, now either Mario or Kirby must turn giant to battle it; It attacks Mario/Kirby by Punching him, it also may charge if it's hit, if it's knocked back, it will be damaged, if it's HP is cut in half, it will make towers appear under it, a fountain will either appear behind him or in the background, if Mario/Kirby uses their hammers to slash the towers at the background or behind it, if it falls on the fountain, it will fall on Reddie Castle, if it's defeated, it will fall apart and Mario and the Crew may pass
- The word "Reddie" is a play on the word "ready"
- It attacks and acts similarly to Mount Pajamajama (living being)