This boss battle is quite simple to make if you follow it step by step.
STEP 1: Copy the all of the sprites of the ship's phases as well as all of the bullets into your custom graphics folder (background-29/29m, background-148/148m, background-149/149m, npc-7/7m, npc-17/17m) and their txt files. Leave behind all other graphics included in this download for now, or else it will make this process a lot harder than it needs to be.
STEP 2: Create your layers and events. (Does not have to have the exact same names.)
Layers--Phase1, Phase2, Phase3, Star
Events--Phase1_Up (layer movement=Phase1, vertical speed=-5, trigger event=Phase1_Down after 1 second, auto start), Phase1_Down(layer movement=Phase1, vertical speed=5, trigger event=Phase1_Up after 1 second), Phase2-Up, Phase2_Down, Phase3_Up, Phase3_Down, Phase2 (show layer=phase2), Phase3, End_Phase1 (show layer=Phase2, hide layer=Phase1, trigger event=Phase2), End_Phase2, End_Game (show layer=star, hide layer=Phase3)
Note: Auto start all Phase#_Up events.Note: Auto start all Phase#_Up events.
STEP 3: Create the first phase. Please note that these measurements do not need to be exact, just try not to stray too far from these guidelines.
3a. Place the first ship BGO in layer "Phase1", between 1 and 2 blocks from the ground (1.5 works best, 1 is a little glitchy sometimes).
3b. Place a gray SMB3 switch block (hit=End_Phase1) in the top right corner of the ship, in layer “Phase1”.
3c. Place three downward pointing SMB3 spikes in the remaining three spots, covering the rest of the ship, in layer “Phase1”.
Turn off Auto-Align to complete the next steps.
3d. Place a gray bullet NPC (generator=0.5 seconds, left, projectile) aligned with what appears to be a launcher on the left side of the ship. Keep it as close as possible to the ship (about 8-10px) for the best effect, in layer “Phase1”.
3e. Place a purple bullet NPC (generator=5 seconds, down, projectile) aligned with what appears to be a launcher on the bottom of the ship. Keep it as close as possible to the ship (about 8-10px) for the best effect, in layer “Phase1”.
STEP 4: Create the second phase.
Repeat 3a, 3c to 3e using the second ship BGO (background-148).
4b. Place a gray SMB3 switch block (hit=End_Phase2) in the top right corner of the ship, in layer “Phase2”.
STEP 5: Create the fifth phase.
Repeat 3a, 3c to 3e using the third ship BGO (background-149).
5b. Place a gray SMB3 switch block (hit=End_Game) in the top right corner of the ship, in layer “Phase3”.
STEP 6: Place a star in the layer “Star”.
STEP 7: Copy in the rest of the graphics.
Sorry if some of these instructions are a little unclear. You should be able to figure it out though with these as guidelines and check some of the troubleshooting, shoot me a PM, or comment below if you need any further help. These intstructions are only one possible way of creating this boss; there are other sequences of events and layers that could likely be created to get the same/similar result.
TROUBLESHOOTING:
Do all events link to other events except for the last one?
Are all of the phases in their appropriate layers?
Are all of the generators in their appropriate layers?
Are all graphics required in your graphics folder?
Are all of the spikes and the switch in each of the layers?
Are the switches set to trigger their appropriate events?
Note: The test level only uses a single phase.
