Quick answer
Provide a repeatable prepare, attempt, record, compare, and upgrade loop without unsourced opponents or rewards.
Start here when this is the exact player task you searched for. The sections below turn the question into steps, checks, and next pages.
Arena is an official pet-combat route; record the requirement, team, opponent, and result shown in the current server before changing one variable.
For grow a pet fighter arena guide, use the quick answer first, then check whether the topic affects a code reward, event, item, unit, map, build, value, or upgrade path.