I know I did it before but my world got corrupted:
/summon pillager ~ ~1 ~ {PatrolLeader:1b,Patrolling:0b,CanJoinRaid:1b,HandItems:[{id:"minecraft:crossbow",count:1},{id:"minecraft:firework_rocket",count:127,tag:{Fireworks:{Flight:127,Explosions:[{Type:"large_ball",Flicker:1b,Trail:1b,Colors:[16711680],FadeColors:[0]},{Type:"burst",Flicker:1b,Trail:1b,Colors:[6684927],FadeColors:[255]}]}}}],ArmorItems:[{},{},{},{id:"minecraft:white_banner",count:1,tag:{item_name:'{"color":"gold","translate":"block.minecraft.ominous_banner"}',banner_patterns:[{pattern:"rhombus",color:"cyan"},{pattern:"stripe_bottom",color:"light_gray"},{pattern:"stripe_center",color:"gray"},{pattern:"border",color:"light_gray"},{pattern:"stripe_middle",color:"black"},{pattern:"half_horizontal",color:"light_gray"},{pattern:"circle",color:"light_gray"},{pattern:"border",color:"black"}],hide_additional_tooltip:{}}}]}/summon pillager ~ ~1 ~ {PatrolLeader:1b,Patrolling:0b,CanJoinRaid:1b,HandItems:[{id:"minecraft:crossbow",count:1},{id:"minecraft:firework_rocket",count:127,tag:{Fireworks:{Flight:127,Explosions:[{Type:"large_ball",Flicker:1b,Trail:1b,Colors:[16711680],FadeColors:[0]},{Type:"burst",Flicker:1b,Trail:1b,Colors:[6684927],FadeColors:[255]}]}}}],ArmorItems:[{},{},{},{id:"minecraft:white_banner",count:1,tag:{item_name:'{"color":"gold","translate":"block.minecraft.ominous_banner"}',banner_patterns:[{pattern:"rhombus",color:"cyan"},{pattern:"stripe_bottom",color:"light_gray"},{pattern:"stripe_center",color:"gray"},{pattern:"border",color:"light_gray"},{pattern:"stripe_middle",color:"black"},{pattern:"half_horizontal",color:"light_gray"},{pattern:"circle",color:"light_gray"},{pattern:"border",color:"black"}],hide_additional_tooltip:{}}}]}Comments 2
The command format has updated, try this
summon pillager ~ ~1 ~ {PatrolLeader:1b,Patrolling:0b,CanJoinRaid:1b,HandItems:[{id:"minecraft:crossbow",count:1},{id:"minecraft:firework_rocket",count:99,components:{max_stack_size:99,fireworks:{flight_duration:127,explosions:[{shape:"large_ball",has_twinkle:1b,has_trail:1b,colors:[I;16711680],fade_colors:[I;0]},{shape:"burst",has_twinkle:1b,has_trail:1b,colors:[I;6684927],fade_colors:[I;255]}]}}}],ArmorItems:[{},{},{},{id:"minecraft:white_banner",count:1,components:{"minecraft:banner_patterns":[{color:"cyan",pattern:"minecraft:rhombus"},{color:"light_gray",pattern:"minecraft:stripe_bottom"},{color:"gray",pattern:"minecraft:stripe_center"},{color:"light_gray",pattern:"minecraft:border"},{color:"black",pattern:"minecraft:stripe_middle"},{color:"light_gray",pattern:"minecraft:half_horizontal"},{color:"light_gray",pattern:"minecraft:circle"},{color:"black",pattern:"minecraft:border"}],"minecraft:hide_additional_tooltip":{},"minecraft:item_name":'{"color":"gold","translate":"block.minecraft.ominous_banner"}'}}]}summon pillager ~ ~1 ~ {PatrolLeader:1b,Patrolling:0b,CanJoinRaid:1b,HandItems:[{id:"minecraft:crossbow",count:1},{id:"minecraft:firework_rocket",count:99,components:{max_stack_size:99,fireworks:{flight_duration:127,explosions:[{shape:"large_ball",has_twinkle:1b,has_trail:1b,colors:[I;16711680],fade_colors:[I;0]},{shape:"burst",has_twinkle:1b,has_trail:1b,colors:[I;6684927],fade_colors:[I;255]}]}}}],ArmorItems:[{},{},{},{id:"minecraft:white_banner",count:1,components:{"minecraft:banner_patterns":[{color:"cyan",pattern:"minecraft:rhombus"},{color:"light_gray",pattern:"minecraft:stripe_bottom"},{color:"gray",pattern:"minecraft:stripe_center"},{color:"light_gray",pattern:"minecraft:border"},{color:"black",pattern:"minecraft:stripe_middle"},{color:"light_gray",pattern:"minecraft:half_horizontal"},{color:"light_gray",pattern:"minecraft:circle"},{color:"black",pattern:"minecraft:border"}],"minecraft:hide_additional_tooltip":{},"minecraft:item_name":'{"color":"gold","translate":"block.minecraft.ominous_banner"}'}}]}
Mojira is not a help desk, please refer to other platforms for help with command formatting.