Lava

Lava is a common hazard in the Mega Man games, the name also being used for molten metal and similar hazards. Lava usually instantly kill the player if he comes in contact with them. While other obstacles like pitfalls have been used with similar instant-death capabilities, lava is constantly instant-death throughout in several games. This obstacle is usually present with fire-elemental bosses.

Mega Man series
Lava is present as a instant-death hazard in Mega Man (Fire Man's stage), Mega Man 2 (Heat Man's stage), Mega Man: Dr. Wily's Revenge (Fire Man's stage), Mega Man: The Wily Wars (the first Wily Tower stage, in the battle against Fire Snakey).

Mega Man 6
Flame Man Stage: Although technically not lava, the Oil Pits in Flame Man's stage served a simular purpose to Lava. If a Fire Telly ignites an Oil Pit with its flamethrower, the oil ignites to produce a raging inferno that can kill the player instantly upon contact.

Mega Man 7
Junk Man Stage: Lava had a instant-death propiety but the player can save if use the invincibility period or use the Freeze Cracker.

Mega Man 8
Sword Man Stage: Lava is a secure death, the player can use the invincibility period, but the stage propiety is danger because the player only walk in a boat, and the floor had spikes.

Mega Man 9
Magma Man Stage:Lava is present as a hazard in Magma Man's stage, typically being kept underneath platforms and jumps. There are also a number of Magma vents that dump magma onto the floor below, killing the player instantly should they touch it. However, it can be frozen in place using the Concrete Shot.

Mega Man & Bass
1st Stage in King Castle: In the battle against Atetemino Proto and Monking A.

Mega Man X /Mega Man Xtreme 2
Flame Mammoth Stage: Lava is in constantly movement and the player get a critical damage in contact.

Megaman X2 /Megaman Xtreme
Flame Stag Stage: Lava is instant-death capabilities, specialy in the part when the lava get up.

Mega Man X4
Magma Dragoon Stage: Lava in all cases is a instant-death, the player only can save if use a Ride Armor.

Mega Man X5
Mattrex Stage: The same like Mega Man X4.

Mega Man X6
1st Stage in Gate Lab: The lava get up from the second half to the Boss Room. Is a instant-death in all cases.

Mega Man X7
Flame Hyenard Stage: The lava is present in the second half, and is a instant-death in all cases.

Mega Man X8
Burn Rooster Stage:

Mega Man Legends 2
Saul Kada Ruins: The contact with lava isnt mortal, but had a effect like poison in the player if the flames is not extinguish.

MegaMan Battle Network Series
Lava is a effect and a panel type, also is called cross the LavaPanel Chip, cause a damage in the player until he had a Fire-Elemental Navi. Present in MegaMan Battle Network 2-6.

In MegaMan Battle Network 2 and 6, an attack used by HeatMan can make lava appears in the battle field. This event doesn't affect MegaMan if he is using a fire-elemental Style Change.

In MegaMan Battle Network 3, FlameMan.EXE doesn't has an relationship with the LavaPanels, but also him dont have damage from this chip. However, when the player come to there are fire viruses in Undernet 3 for FlameMan.EXE, all this virus ever use LavaPanel.

MegaMan Battle Network 4
FireMan.EXE/BurnMan.EXE : In BurnMan event, during the Second Tournament, when Mr.Match and Atsuki fight, all Internet burns, causing the Fire-virus appears togheter the LavaPanel.

Megaman Battle Chip Challenge
Hades Isle: Is the unique stage where the LavaPanel exist.

Megaman Network Transmission
Fireman.Exe Stage: The lava had a instant-death effect.

Defense Against Lava

 * Taking damage from an enemy and touching the lava during the slight invincibility period. (However, this doesn't work in the first Mega Man game, in which any form of contact with the lava would kill the player instantly.)
 * In Mega Man X, a fully charged Chameleon Sting will render X invincible, even against the lava for the duration of the effect.
 * In Mega Man Xtreme, a fully-charged Rolling Shield renders X invulnerable to the lava
 * In the original Mega Man, the Magnet Beam will create a platform that the player can walk over the lava.
 * In Mega Man 6-10, Rush's attachments, especially the Rush Jet, can cross the player over the lava.
 * In Mega Man X4 and Mega Man X5, the Ride Armor is invulnerable to the lava effects.