Wisp Capsules are differently-sized capsules for imprisoning Wisps, which always float in one place. Regular Wisp Capsules have a red-colored chassis at the bottom with a transparent top cover. Each Wisp Capsule contain only one specific type of Wisp within it. Usually, Wisp Capsules only hold one Wisp each, although there are exceptions.
To open a Wisp Capsule in gameplay, the player simply has to touch it. The player will then automatically obtain its Wisp. Also, after opening a Wisp Capsule, another one with the same type of Wish in it will soon after appear in the same spot.
In both versions of Sonic Colors, Wisp Capsules can be found in each Act. For most types of Wisps, Wisp Capsules only hold one Wisp each. In the case of White Wisps, however, the Wisp Capsules can hold about four or five of them.
In gameplay, Wisp Capsules for Wisps that the player has yet to encounter will be empty, transparent and cannot be interacted with. Also, these Wisp Capsules have a certain color shade that signifies which Wisp it is supposed to contain.
While numerous Acts in the game ends with a Goal Ring, there are some that have a giant Wisp Capsule, called the Prison Capsule, instead. These capsules are placed on the ground and contain numerous White Wisps in two long tubes. The Prison Capsules act as Goals that, once opened, means the player has cleared the Act, much like Capsules.
Wisp Capsules made an appearance in both versions of Sonic Generations. In this game, the Wisp Capsules are more detailed than in Sonic Colors, with a yellow eye having been added on the middle, similar to ones on the Prison Capsules in Sonic Colors.
In the console/PC versions, Wisp Capsules only appear in Planet Wisp, and on the Nintendo 3DS version, they only appear in Tropical Resort and can be acquired through a Homing Attack. In both versions, the Wisp Capsules only containing one type of Wisp for each Act.
In Sonic Forces, the Wisp Capsules look like their Sonic Colors counterparts, possessing no yellow eye on their middle. Like in Sonic Colors, most Wisp Capsules hold only one Wisp, except for those holding White Wisps, which can contain more.
In gameplay, Wisp Capsules can be found in the Sonic Stages, the Avatar Stages, the Tag Stages and some of the secret stage and extra stages. In the stages where Modern Sonic/Shadow is playable, the Wisp Capsules will only contain White Wisps. In the stages where the Avatar is playable on the other hand, the Wisp Capsules can contain any type of Wisp avilable in the game, except for the White Wisps. Finally, the Tag Stages' Wisp Capsules can contain any kind of Wisp.
Much like in Sonic Colors, any Wisp Capsule in the Avatar's stages that contain Wisps that do not match any of the Wispons the player has currently obtained will be rendered intangible and transparent until the player obtains their Wisp's associated Wispon. The color of the transparent Wisp Capsules indicate which Wisp is supposed to be in it.
If Sonic is using a specific Color Power, say, Pink Spikes, and collects a Wisp Capsule containing a Pink Wisp, then the Wisp Gauge will be replenished. But if he collects any other color Wisp besides the color he is currently using, then he cannot use that Color Power until he is finished with the Pink Spikes.
While Wisps make reappearance in Sonic Lost World and Sonic Runners, all Wisp Capsules are replaced with Item Boxes, which contain Wisps and other traditional items. After releasing the Wisp from Item Box, the player can activate the Color Power.