Traveller

Traveller is a 2017 pet, and its history is tied to a single event. The Halloween Item Pack was sold as a gamepass for 1,299 Robux during the Halloween Event 2017. The event is over and the pack is offsale, so Traveller is only available through trading.

The Halloween 2017 event page lists the pack as three items: the godly knife BattleAxe, the Traveller pet and the Bats effect. Traveller partners with BattleAxe to make the Halloween 2017 set, which is how the wiki groups the two.

Its model derives from Pumpkingeist, a Roblox bundle that is itself offsale now. The wiki gives no written appearance for the pet, so the Pumpkingeist origin is the only visual clue it offers; the pet's picture on the page is the better reference for details like color.

Two small cautions apply. The pack was a Halloween item pack sold as a gamepass rather than a battle pass tier, so there is no tier number to look for. And the wiki lists no unbox chance or ability, which is consistent with a gamepass reward. What is confirmed is the year, the price, the offsale status and the pairing with BattleAxe.