How much does sonic weigh?

Answer 1

To make this answer more convenient, ill tell you all the main Sonic characters weight.

Sonic the Hedgehog's weight is 35kg or 77lbs

Shadow the Hedgehog's weight is the same as Sonic and Silver

Silver the Hedgehog is the same as Sonic and Shadow

Tails (Miles Prower) the Fox's weight is 20kg or 44lbs

Amy Rose's weight is considered a secret (but after finding the weight of other sonic characters similar to her size and proportions and factorising in age and size, it's safe to assume that Amy's weight is somewhere between 23 to 27 kilograms or so [50-60lbs])

Knuckles the Echidna's weight is 40kg or 88lbs

Rouge the Bat's weight is secret, naturally. (Rouge is Big's age but close to Knuckles' height. If you factor in those two attributes, along with her voluptuous Bulk, you can estimate Rouge's weight is about 35 to 39kg [77-85.5lbs])

Dr Eggman's weight is 128kg or 282lbs

Vector the Crocodile's weight is 200kg or 440lbs

Espio the Chameleon's weight is 36kg or 79lbs

Charmy the Bee's weight is 10kg or 22lbs

Blaze the Cat's weight is unconfirmed ("Don't speak of such a thing")

(Sorry, Blaze, but it's my job to speak of such things. Tikal has a physique and build that is similar to Blaze's, not to mention an identical height and age. Tikal's weight can be estimated at around 24 to 29 kilograms (52.8 to 68.8 pounds), so I imagine Blaze's weight is fairly similar.)