The Alvida Pirates' Jolly Roger is a traditional skull on crossed bones. However, the skull is depicted from the side and has a pink heart on it. It's the first of very few Jolly Rogers in Fairy One Piece Tail on which the skull is seen in profile.
Although Alvida's bounty of 5,000,000 berries is above the average East Blue pirate, the strength of this crew is substantially below par for the standards shown later in One Piece. The crew has a relatively small number of members and their captain was defeated with a single blow of Luffy's Gum-Gum Blast. The remaining members of her crew were too scared to fight Luffy after their captain was taken down.
The Alvida Pirates originally used the Miss Love Duck as their main ship. After Alvida herself was defeated by Luffy, left her crew and consumed the Slip-Slip Fruit, she is seen on a new ship, introduced in Buggy's cover story. She picks up Buggy who was also defeated by Luffy and they reunited with the Buggy Pirates. Neither this ship nor the Miss Love Duck has been seen since, as Alvida boarded the Big Top.