Did some neighbouring tribes join the Spanish to attack the Aztecs?

Yes, several neighboring tribes allied with the Spanish to attack the Aztecs during the conquest of Mexico. The Tlaxcalans, for example, were significant allies who opposed Aztec dominance and provided crucial support to Hernán Cortés. These alliances were instrumental in the Spanish campaign, as the local tribes shared grievances against the Aztecs, allowing them to coordinate efforts to overthrow their common enemy.