From the Super Mario Wiki
The Training Machine is an item from Super Paper Mario. It is a 2-screened handheld that resembles a Nintendo DS. Mario received it from Bestovius to deliver to Merluvlee, after giving Bestovius the You-Know-What. Upon giving it to Merluvlee, Mario questions which body part Merluvlee would use it to train and Merluvlee cheerfully replies that she trains her brain, which is a reference to Brain Age. Apparently, the Training Machine is an old model; Bestovius claims to have a newer, slimmer version (likely a reference to the Nintendo DS Lite). This is used in the Piccolo side quest. In return, Merluvlee gives a Crystal Ball to give to Merlee. Giving this to her will gain the player a key to a house in Flopside where Piccolo is trapped.
Names in other languages
||diminutive of máquina (machine).