Dangos are based on the armadillidiidae family of insects, more commonly known as pill bugs. They got protecting armor on their back, white eyes and small mechanical legs. Dangos come in two color schemes in each of the two Rounds they appear in. Green variations appear in Stardust Speedway, whereas orange-brown ones appear in Metallic Madness.
Sonic the Hedgehog CD
In Sonic the Hedgehog CD, the Dangos appear Stardust Speedway and Metallic Madness as enemies. They are normally crawling slowly along the ground, but when they see the playable character, they will curl into a ball and roll towards the character to damage him, similar to the Spin Attack. While curled up, the Dangos are invincible, and attacking the rolling Dangos head-on with the Spin Attack will only repel them upon impact without damaging them. Dangos can be defeated with a Spin Jump while they are in crawling position though.
The brown Dangos in Metallic Madness appear aged and broken down in the Round's Bad Future and they roll much slower. However, the green Dangos in Stardust Speedway have not aged in that Round's Bad Future. Like every Badnik in the game, they are powered by Little Planet flower seeds which will pop out of them when they are defeated.
In Sonic Mania, the Dangos reappear as enemies. Excluding their color schemes, they look exactly like their pristine versions in their debut. In this game, they are encountered in Stardust Speedway Zone Act 1 and 2. Their behavior in gameplay are likewise consistent with that featured in Sonic the Hedgehog CD, which includes then crawling along the ground and curling up into a speedy roll (which a Spin Attack can repel) when a target is close.
In Stardust Speedway Zone Act 1, which takes place in the Past timeframe, Dangos have a purple color scheme. This changes to the regular green color scheme in the Present timeframe of Stardust Speedway Zone Act 2. Also, upon destroying a Dango in this game, it will release an Animal.
Powers and abilities
The Dangos have the ability to assume spherical forms to roll over opponents with, similar to the Spin Attack. While in this form, they possess an absolute defense.
"Dango" is short for "Dangomushi" (ダンゴムシ), the Japanese word for "Pill Bug".
The Dango appears to use the same concept as the Roller from Spring Yard Zone. The only real difference is that they are invincible when in its ball form, while the Roller is easily destroyed.
↑While not listed in any instruction manuals, the in-game source code in 1996 PC release of Sonic the Hedgehog CD refers to this Badnik as "dango".
↑The PC version of Sonic Mania listed the enemy as "Dango" according to the internal files of the game.