The Eternal Star in Roblox Animal Training appears to be a special reward pet you can get from playtime or bonus rewards, rather than something you “train” directly. Public posts mention it as a cool special pet and include it among rewards you can claim from the game’s gift/playtime systems.

What it likely is

  • A special pet reward in Animal Training.
  • Mentioned alongside other bonus items like speed, wins, and potions.
  • Likely used to help your progress in the game, not just for looks.

How people seem to get it

  • Claim playtime rewards from the gift icon.
  • Check for offline rewards and other bonus systems.
  • Some community posts suggest it may appear as part of special reward drops.

Important note

There doesn’t seem to be an official, clearly documented explanation in the results I found, so most of what’s circulating looks like community info rather than a full game guide.

Would you like me to turn this into a short forum-style answer you can post?