Before Beast Wars Episode 2 event, Super Rare is the highest rarity. These characters are very playable and carry very strong special attacks, as well as beneficial first strike patterns.
Super Rare (SR) characters require not only a lot of Cybermetal and Transmetal material, but also their own special cores. These cores are very hard to obtain through battle, encouraging use of the Space Bridge . Anywhere from 5 to 20 cores may be needed for such a character.