Sunekura is a giant snake who appeared in Hi Hi Puffy AmiYumi.
In Super Zero
When Atchan was staying in the tour bus with Ami, Yumi and Kaz, he tells them about Sunekura. Later on, Sunekura kidnaps both Ami and Kaz. Yumi gets captured when she tries to rescue them, so Atchan rescues them. He knocks himself out when trying to fight Sunekura, but he gets back up when she falls down laughing because she couldn't believe Atchan is her feared nemisis. Atchan frees Ami, Yumi and Kaz from the cage Sunekura puts them in and they run away when Sunekura tries to stop them from escaping. She ends up bumping her head in her lair and gets crushed by many falling rocks.