Battle Windows

Random Number Generation

Attacks

First Turn

During the first turn of each Battle Windows enemy, there is a 25% chance for Battle Windows to attack first. This is a notorious point of chance in the run where time can be lost if Battle Windows attacks first.

When Battle Windows attacks first, time loss can vary depending on the attack that is done. The worst possible luck is having an enemy shield on their first turn, which requires a whole additional turn to defeat it.

In specific circumstances, it is actually beneficial to have Battle Windows to attack first, but this is typically only done in TAS. An example of this is using Suplex while fighting Red Dragon. By having Red Dragon attack first, Kirby can grab its attack and defeat it in one turn.

Ability Appearance

When it is Kirby's turn to attack, abilities have a chance of appearing on each side of the screen. Several random numbers are used during this process. This calculation is different from power calculation in The Arena rest area.

Procedure

Flowchart depicting how Battle Windows uses RNG.

• 1.) Determine if a power will appear on the right side:
  • 64 < RNG < 127: Power appears
  • Else: Does not appear (Skip steps 2 and 3)

• 2.) Determine which pool to choose from:
  • 0 < RNG < 63: Pool 1 (Sprite number 90)
  • 64 < RNG < 127: Pool 2 (Sprite number 91)
  • 128 < RNG < 191: Pool 1 (Sprite number 90)
  • 192 < RNG < 255: Pool 2 (Sprite number 91)

• 3.) Choose a power from the pool chosen:

RNG	Ability Pool 1	Ability Pool 2
0 - 21	Fighter	Stone
22 - 42	Plasma	Cutter
43 - 63	Hammer	Wheel
64 - 85	Beam	Jet
86 - 106	Bomb	Ice
107 - 127	Sword	Parasol
128 - 148	Hammer	Fire
149 - 170	Bomb	Suplex
171 - 191	Plasma	Ninja
192 - 213	Sword	Yo-yo
214 - 233	Beam	Mirror
234 - 255	Fighter	Wing

• 4.) Determine if a power will appear on the left side:
  • 128 < RNG < 191: Power appears
  • Else: Does not appear (Skip steps 5 and 6)

• 5.) Same as step 2
• 6.) Same as step 3

Notes:

• If no abilities appear for 3 consecutive turns, abilities will appear from both sides on the next turn (steps 1 and 4 are skipped).
• In the rare circumstance that abilities appear on both sides, and both sides contain the same ability, step 4 will be repeated again after step 6. This will continue to repeat until either both abilities are different, or only a right side ability appears.