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Nightmare Rex SW145SD is a Balance Type Beyblade that was released with the Beyblade: Metal Masters video game on December 10, 2010 in Japan and on November 15, 2011 worldwide. It is owned by Agito.

It is succeeded by Ancient Rex SW145SD in the Beyblade: Metal Masters video game.

Face Bolt - Rex[]

Main article: Face Bolt - Rex

The Rex Face Bolt depicts one of the most well known dinosaurs, the Tyrannosaurus Rex. The design of Rex features a skull looking to the left while showing its neck.

Energy Ring - Rex[]

Main article: Energy Ring - Rex

Rex, as its name states, is designed in the manner of the Tyrannosaurus Rex's head, neck, and tail on the Energy Ring's two sides.

Fusion Wheel - Nightmare[]

Main article: Fusion Wheel - Nightmare

The Nightmare Fusion Wheel features a three-winged design with a small gap between the wings. The three "wing designs" appear to resemble the "spine" or rather, "tail" of a Tyrannosaurus Rex's skeleton.

Performance-wise, Nightmare isn't so good in terms of Attack potential, as it suffers the same problem as Galaxy; being that the wings curve into Nightmare's main contact points, causing low Attack potential; with Blitz and Flash serving as better options.

Spin Track - Switch 145[]

Main article: Spin Track - Switch 145

SW145 has three 'wings'. The gimmick of this Track is the ability to change from Attack to Defense by taking off the wings, and then putting them on the opposite way. The purpose of this is the ability to adapt to opponent Beys. In Attack mode, which is denoted by six grey claw-like stickers on the underside, the pointed ends of the Track are used for Smash Attack; meanwhile in Defense mode, shown by three triangular blue stickers, the edges are more rounded, in order to deflect opponent Beys. The modes are reversed for Left-Spin Beys. Testing has shown that SW145 is quite useful at attacking lower opponents in a similar fashion to H145 and R145. It is however outclassed for Defense purposes by GB145, BD145, and 230 due to the recoil it produces.

Performance Tip - Semi-Defense[]

Main article: Performance Tip - Semi-Defense

Just as the Semi-Flat Bottom has a sharper tip than Flat, so too does Semi-Defense when compared to Defense. Before the release of SD, D was the absolute best Stamina Bottom available, but SD quickly took over the top spot, as is evidenced by the following tests:

SD is not able to wobble as much as D, so for defensive purposes, D should still be chosen over SD if you are trying to add some Stamina to your Defense custom. That being said, WD would be a better choice than D for that situation, and also arguably for Stamina as well because with the even wider tip. With it, it is allowed to circle the stadium in some situations when it is on a larger angle towards the end of a battle, thus outspinning D or SD based opponents. However, sometimes this does not happen, and SD easily knocks over the wobbling WD custom before it topples over itself.

It really comes down to personal preference when deciding whether to use SD or WD because they are so closely matched. For pure Stamina, it is impossible to tell which would win a given match, but WD would prepare you for more situations by being able to take hits better than SD. Test both and decide for yourself which one works best for what you are trying to do.



  • This is the second time a Beyblade was released with SW145SD, the first being Poison Serpent SW145SD, and the third being Ninja Salamander SW145SD.
  • After you defeat Agito in the video game, it evolves into Ancient Rex.
  • According to, Nightmare Rex is classified as Defense Type Beyblade, but the actual products state Nightmare Rex to be a Balance Type.