In Melee and Brawl, Samus' bomb recovery is performed by simply using her bomb move in the air, and then laying a second bomb to hit the first and bounce herself upwards. Repeat as desired. This gives Samus the ability to recover easily from any attack, and when combined with techniques such as Samus' Grapple Beam and Rising Grapple, edgeguarding her is a serious chore. The bombs come out quicker overall in Melee but it is easier to weave around the bombs in Brawl due to the floatiness of the game.
In SSB, Link can perform a bomb recovery, but this is extremely difficult and almost unusable outside of by slowing the game down, as in using TAS. A bomb can also be thrown into one's self near an edge of the stage to steal a KO from an opponent in time mode.
In Melee and Brawl, Link's bomb recovery is reasonably difficult, but it is the best way to get the most out of the player's recovery with Link. Lord HDL defines it as follows:
There are three ways to perform the Bomb Recovery:
If the player can predict it, they could also pull out the Bomb ahead of time and have it explode in his hand after they Spin Attack. Then he can Spin again. This is usually done accidentally, and is the only way for the Links to use bomb recovery in Brawl, since they can no longer slash their own bombs.
Snake's bomb recovery is very much like Link’s. When falling, if a C4 is planted and Snake fast falls and detonates it on himself, he can use Cypher again because it causes flinching. However, unlike Link’s bomb recovery, this can be repeated infinitely until Snake is KO'ed by the blast, and is arguably much easier to perform.
Snake can also perform bomb recovery using his Hand Grenades. If he picks up and holds a grenade before being sent in the air (such as by shield-dropping it and picking it up again), then when the grenade explodes after its timer runs out, Snake will be able to use his up special again.
In Ultimate, Snake can also use his grenades mid-air for a bomb recovery. This is done by pressing neutral special, holding backwards to throw the grenade upwards, using Cypher, and airdodging or using an aerial as you meet the grenade to catch it. The grenade will then explode, allowing Snake to use Cypher again. However, since the Hand Grenade has much less knockback than Snake's C4, this may not give you any additional recovery height at low percents. At higher percents, however, this allows Snake to use Hand Grenade to bomb recover where his C4 would knock him above the upper blast zone.
It is plausible that Peach can use a Bomb Recovery if she is hit off the stage while holding a Bob-omb produced through her down special move. However, this is unlikely and not very useful for a number of reasons; Peach is likely to drop the Bob-omb when she's hit, a Bob-omb would probably KO her directly at such percentages, Peach can only take a bomb out on the ground, and Peach's horizontal recovery needs no help. This is also usually used to refer to Peach Bomber stalling, a Melee-specific technique to recover.
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