User blog comment:B214/Question and Answers 6/@comment-61.94.131.116-20170102040146/@comment-29963364-20170106033907

No. During the events of vol.21, when Tobio Ikuse revealed his Abyss-Side BB, Vali monologued about other types of BB's. He mentioned...


 * Regular


 * Sub-Species


 * Abyss-Side 


 * Irregular

Vali mentioned that Issei's [Illegal Move Trianna] and [Cardinal Crimson Promotion] were Irregular BB's. They are this type because they were the result of Issei combining the power of his Boosted Gear with the power of his Evil Pieces.

He also mentioned that Yuuto Kiba's Balance Breaker, [Sword of Betrayer] is an Irregular BB too, because Yuuto achieved it by combining Light Attribute with his Sacred Gear, Sword Birth.