Essentially, Skeleton Rushes are Skull heads that decide to bum-rush you. With dozens at a time. Just kill them before their attacks fill the screen and you should be alright.

This fight has a rather large amount of safespots.

Ships Vic Viper
Stages Stage 1Stage 2Stage 3Stage 4PC-E Exclusive StageStage 5Stage 6Stage 7
Sub Bosses VolcanoZub RushMother and ChildIron MaidenTentacle GolemElectronic Cage

Skeleton Wave (PC Engine) • Tri Core Crystal (MSX) • Polliwog Rush (Spectrum)

Bosses Big CoreCell NucleusXaerous Brain
Gradius ReBirth
Characters James Burton (Vic Viper) • GaudieVenom
Stages Stage 1Stage 2Stage 3Stage 4Stage 5
Bosses VolcanoIron MaidenBig Core DuoZub RushCrawler XMoai OrbSkeleton WaveEnigmaElectronic Cage MK2Xaerous Brain
Sub Bosses / Panic Segements
Traditional / Recurring VolcanoZub RushIron MaidenSkeleton WaveCenter CoreJumping MoaiDogas
One Shot Mother and ChildTentacle GolemIron Maiden MK 2Maru MaruStatue GuardiansAsteroid FieldProminence ZoneBlock CoreTriple CoreRotating Moai