Big Wiggler

Big Wigglers are a type of Wiggler that first appeared in New Super Mario Bros. Wii. Unlike normal Wigglers, their size typically causes them to not notice when Mario jumps on them, though they can sometimes be found angry by default.

New Super Mario Bros.
A giant Wiggler appears as an unused enemy in New Super Mario Bros., suggesting that they were going to appear during gameplay but were either never implemented into any level or removed before the final release. They would have had the same behavior as a regular-sized Wiggler. A much larger and longer Wiggler, Kyodai Hanachan, appears as a friendly element in World 7-3.

New Super Mario Bros. Wii
In New Super Mario Bros. Wii, Big Wigglers make an in-game appearance. Despite being enemies, they can help Mario get items normally out of his reach. For this, the players must jump over a Big Wiggler and press the or  button to do a high jump, as if they were using a Spring.

Big Wigglers can hurt Mario by running into him while on their preset paths. They can also defeat Swoops, along with most other enemies upon making direct contact. Also, they do not get angry if Mario jumps atop them, unlike normal Wigglers.

It should also be noted that the Big Wiggler is one of the very few enemies that cannot be defeated by any means, and they can push Mario around, even when he's under the effects of the Super Star. They can only be defeated by reaching the flag at the end of the level, just like King Bills.

Super Mario Galaxy 2
Big Wigglers reappear in Super Mario Galaxy 2 in the Supermassive Galaxy. They appear on the Stone Tube Planet, where Mario must avoid running into them to reach the Power Star. A pair of angry Big Wigglers circle the tube towards the end. They cannot be defeated, but the Co-Star Luma is able to stop them from moving and hurting Mario.

New Super Mario Bros. U / New Super Luigi U
Big Wigglers return in New Super Mario Bros. U, having the same role as in the predecessors. They are found in Soda Jungle, and appear in Wiggler Stampede.

In New Super Luigi U, Big Wigglers appear in Wiggler Floodlands, where they are used to cross poison.

Super Mario Maker / Super Mario Maker for Nintendo 3DS
Big Wigglers reappear in Super Mario Maker and Super Mario Maker for Nintendo 3DS, where giving a Wiggler a Super Mushroom will increase it in size, effectively turning it into a Big Wiggler. Big Wigglers appear in all styles. Unlike in New Super Mario Bros. U, they appear slightly smaller and have the same behavior as regular Wigglers as they can become angry and can be defeated.

Super Mario Maker 2
Big Wigglers return in Super Mario Maker 2, behaving the same as in Super Mario Maker. Also unlike the New Super Mario Bros. games, Big Wigglers cannot walk through poison, and simply sink through it.

Mario Kart series
Big Wigglers make their first Mario Kart appearance in Mario Kart Wii in Maple Treeway. If a driver bumps into them, their kart will be pushed back. Maple Treeway makes a reappearance in Mario Kart 7, and so do the Big Wigglers. In Mario Kart Wii, players also had to race against a Big Wiggler in a tournament on Wario's Gold Mine that took place on December 2008 and September 2010.