Ally is Fifi Laguarde's pet alligator who lived in the prison's yard.
Swallowing the evidence[]
After killing Bronco Knight, Laguarde had Ally hide the knife used as the murder weapon in her mouth. During the subsequent investigation of the yard, Miles Edgeworth had Detective Dick Gumshoe use his metal detector to search for missing weights used for a show at the prison by Berry Big Circus, during which the detector reacted to Ally.
During a later interrogation of Laguarde, Edgeworth bluffed that he knew the murder weapon was a knife and that it was hidden somewhere in the prison. When Verity Gavèlle demanded to know where he thought it was, Edgeworth, after having an epiphany, answered that it was inside Ally's mouth and compared it to a similar situation earlier in the investigation during which the imprisoned assassin Bodhidharma Kanis had concealed his chisel inside the mouth of his dog Helmut. After being called for by Edgeworth, the animal trainer Regina Berry subsequently ordered Ally to open her mouth, revealing the knife and greatly assisting in proving Laguarde's guilt.