Powers and Stats
Tier: Likely 2-C, possibly higher
Origin: Dragon Ball Z: Shin Budokai
Gender: Genderless, appears male
Classification: Demon composed of all the evil in Hell concentrated into a single entity
Powers and Abilities: Superhuman Physical Characteristics, True Flight, Ki Manipulation, Energy Manipulation, Reality Warping, Space-Time Manipulation, Cloning (Of both himself and others), Immortality (Type 1 and 3), Regeneration (Likely Low-Godly), Afterimage Creation, Incorporeal in his evil energy state, Possession, Absorption, Able to bring the dead back to life, Limited Dream Manipulation
Attack Potency: Likely Multi-Universe level, possibly higher (Capable of warping at least a few universes at once in order to cause them to overlap and send beings from one universe to another, and has decent control over the fabric of space-time)
Speed: Unknown in his physical form (Seems to vary depending on how much energy is placed into each body along with the individual copied). Nigh-Omnipresent in his evil energy state (Capable of spreading his presence across many of Universe 7's timelines)
Lifting Strength: Unknown
Striking Strength: Unknown
Durability: Unknown (Completely unharmed by a much more powerful than normal SSJ3 Gotenks, who was capable of wiping an amped Super Perfect Cell out of the timeline. Destroyed by Super Saiyan Gogeta, though this may be due to PIS or the nature of Gogeta's powers, also capable of fighting with cloned bodies of other characters, who seem to copy their durability, as well)
Range: Standard melee range. Extended melee range with his sword. Multiversal via space-time manipulation (As pure, evil energy, he was able to affect an untold number of timelines)
Intelligence: Unknown. While he can appear rather mindless, he was capable of formulating plans in order to take over Vegeta's body and cause chaos in numerous timelines
Weaknesses: He cannot directly attack in his state of being pure evil energy, though he can still cause distortions in space-time and possess people with enough evil in their hearts. He can put varying amounts of energy into his manifested bodies. When these bodies are destroyed, the used energy disappears. This is shown during his fight with Gogeta, in which he places all of his energy into a single body, apparently being destroyed along with the final body.
Note: This character is non-canon. This version of Janemba appears in Dragon Ball Z: Shin Budokai for the PSP, and is not to be confused with his movie counterpart.