Editing Bull's-Eye Bill

'''Bull's-Eye Bills''', formerly known as '''Missile Bills'''<ref>{{cite|title=''Nintendo Power'' Volume 13|page=9|date=June 1990|publisher=Nintendo of America|language=en-us}}</ref><ref>{{cite|author=Bueno, Fernando|title=''New Super Mario Bros. Wii'' PRIMA Official Game Guide|page=16|date=November 15, 2009|publisher=[[Prima Games]]|isbn=978-0-307-46592-4|language=en-us}}</ref> or '''Guided Missile Bills''',<ref>{{cite|date=Spring 1991|title=''NES Game Atlas''|page=36|quote=Red Guided Missile Bills move back and forth in search of their target.|language=en-us|publisher=Nintendo of America}}</ref> are heat-seeking variants of [[Bullet Bill]]s typically fired from [[Bull's-Eye Blaster]]s. They attack by homing in on the player. Prior to ''[[New Super Mario Bros. Wii]]'' introducing the current '''Search Killer''' (サーチキラー), which eventually became known in English as Bull's-Eye Bill, earlier games gave the homing abilities to normal Bullet Bills or their behavioral or color variations, as various sources treat them as.<ref name=SMCE>{{cite|title=「スーパーマリオ{{ruby|全百科|オールひゃっか}}」 (''Super Mario Zen Hyakka'', or "''Super Mario Complete Encyclopedia''")|page=192|quote=「おなじみの{{ruby|砲弾|ほうだん}}。{{ruby|普通|ふつう}}のキラーは、1{{ruby|方向|ほうこう}}にまっすぐ{{ruby|進|すす}}むだけ、『マリオ3』{{ruby|新登場|しんとうじょう}}の「{{ruby|往復|おうふく}}キラー」は、いったん{{ruby|発射|はっしゃ}}されると、{{ruby|左右|さゆう}}にいったりきたりを{{ruby|繰|く}}り{{ruby|返|かえ}}す。」}}</ref><ref name=SMBHp36>{{cite|quote=「キラー砲台から発射され、まっすぐに飛んでくる。Uターンするタイプもいる。」 ("Fired from Killer Cannons, they fly straight ahead. There is also a U-turning type.")|publisher=Shogakukan|date=2015|title=''Super Mario Bros. Hyakka: Nintendo Kōshiki Guidebook'', Super Mario Bros. 3 section|page=36}}</ref><ref name=SMA3>{{cite|quote=「{{ruby|緑|みどり}}と{{ruby|赤|あか}}の{{ruby|砲台|ほうだい}}は{{ruby|固定式|こていしき}}で、{{ruby|黄色|きいろ}}の{{ruby|砲台|ほうだい}}は{{ruby|回転式|かいてんしき}}。{{ruby|赤|あか}}いキラーは ヨッシーを{{ruby|追|お}}いかけ、{{ruby|黄色|きいろ}}いキ ラーはかべに{{ruby|当|あ}}たるとはね{{ruby|返|かえ}}る。{{ruby|砲台|ほうだい}}を{{ruby|倒|たお}}すならアイス{{ruby|攻撃|こうげき}}で。」 ("''Green and red cannons are a fixed type, while yellow cannons are a rotatable type. Red Killers pursue Yoshi, and yellow Killers bounce off walls. The cannons can be defeated by an ice attack.''")|title=「スーパーマリオアドバンス3任天堂公式ガイドブック」 (''Super Mario Advance 3 Nintendo Kōshiki Guidebook'')|page=[[Media:Advance 3 Shogakukan P15.png|15]]}}</ref> In some games, there are also regular Bullet Bills that perform similar functions to Bull's-Eye Bills, as seen in ''[[Super Mario 64]]'', ''[[Super Mario Galaxy]]'', ''[[Super Mario Odyssey]]'', Smash Run in ''[[Super Smash Bros. for Nintendo 3DS]]'', and sometimes in ''[[Super Mario Sunshine]]'' and ''[[Super Mario Galaxy 2]]''.

Red Bullet Bills appear in ''[[Yoshi's Island: Super Mario Advance 3]]'' in the final secret level, [[Endless World of Yoshis]]. They are fired from [[Bull's-Eye Blaster#Super Mario World 2: Yoshi's Island / Yoshi's Island: Super Mario Advance 3|red Turtle Cannon]]s and appear to make a biting motion as they fly, though this is purely for show. As they fly, they gradually slow down, eventually shrinking away in light blue and vanishing with a pop. They can be defeated by simply [[stomp]]ing or [[swallow]]ing them; they look like regular Bullet Bills if spat back out, but they fly downwards.

 

This is the first game to have them be able to follow the player at any angle, due to the ones in ''Super Mario Bros. 3'' being restricted to lateral movement. However, they still make abrupt u-turns after slowing down when they miss, whereas later games have them keep a smoother trajectory.