Talk:Aurora Beam (move)

Chance of secondary effect

The Stadium description says the secondary effect has a one-in-three chance. Is that description wrong, or did the effect chance used to be that in Generation I? yeyjordan 07:17, 3 June 2014 (UTC)

Going through the core of Red's engine in the pokered disassembly seems to confirm that Aurora Beam does indeed have a 33.2% chance of lowering Attack. The procedure for moves with stat lowering as a secondary effect compares the the value 0x55 (decimal 85) with a random number, which is equivalent to a 85/256 = ~33.2% chance, which has historically only been known for the move Psychic. In-game testing that I've done seems to point to this chance instead of 10%, as stated in the article. Bubble, BubbleBeam, and Constrict are all in the same situation. CunningClaymore (talk) 20:04, 21 March 2017 (UTC)