Largest / biggest bosses

[qmish]

What are big boys? Overall and to each series?

Can't escape mentioning Great Thing or G.T.V. from Darius, etc.

And i think bosses that are themselves as stages should be in separate category (like those from Mushihimesama, Raiden Fighters, DeltaZeal etc.)

[xxx1993]

Gigantic Bite is probably the biggest of them all.

[Asure]

Metal slug has some big uns

Lots more here: https://imgur.com/gallery/iNDqq

[Bananamatic]

titanic lance from darius gaiden
jupiter from batsugun

[Lord Satori]

A few of the bosses from the XOP games cover the entire screen.

[OmegaFlareX]

The entire game of Omega Fighter is you dismantling this gigantic mothership, piece by piece.

[Shepardus]

Largest relative to the size of the player or the screen, I assume?

Stage 3 boss of ring^-27 is pretty big, it's the type of thing that probably could have been its own stage.

[Gespenst]

R-Type series' signature Warship and its different carnations

RefleX bosses especially stage 3's battleship raid

[Jeneki]

Speaking of R-Type incarnations, Pulstar's battleship boss has a full level attached making it an extra long stage.

[ZacharyB]

The mission targets in the Raiden Fighters series, if you can count them as bosses and not half the stage.

[gameoverDude]

The huge battleship in Soukyugurentai's final stage that you finish off right before the end boss.

[XoPachi]

The bosses in Raiden Fighters. They cant fit on the screen and act as stages. Sand Lobster is goddamn enormous.

[M.Knight]

P-47 Aces's stage 2 boss is quite huge and features multiple phases. It has a boss warning but at the same time is also the whole stage, so I am not sure whether it completely fulfills your criteria.

[qmish]

I'm grateful to hear both about "bosses-stages" and "just bosses"!

[Rue]

Apparetoride and Kaijin from 1944 Loop Master are pretty big.