An: This is the known universes.

1: Justice League (Arrowverse and various others added to it)

2: Avengers (Mostly mixed series)

3: Mortal Kombat

4: Transformers

5: Ben 10

6: Naruto

7: Bleach

8: Fairy Tail

9: Sekirei

10: Avatar the Last Airbender/Legend of Korra

11: Call of Duty

12: Totally spies

13: High School DXD

14: Star Wars

15: TMNT 1987/2003/2013

16: Street Fighters

17: Queen's Blade

18: Rosario + Vampire

19: Monster Musume

20: Fast and Furious

21: Gears of War

22: Halo

23: Ghost in the Shell Stand Alone Complex

24: Godzilla (Monsterverse and other series)

25: GI JOE

26: Hellboy

27: Power Rangers (every season)

28: Pacific Rim

29: Maken-Ki

30: How to train your dragon

31: Danny Phantom

32: Jackie Chan Adventures

33: Army Men

34: Kim Possible

35: Akame Ga Kill

36: God of War

37: Saints Row

38: Generator Rex

39: Megas XLR

40: Xiaolin Showdown

41: He Man and the Masters of the Universe 2002

42: Jurassic Park

43: One Piece

44: All Grown up

45: Code Lyoko

46: Yugioh (everything)

47: Pokemon

48: Elder Scrolls

49: CSI

50: The Black List

51: Criminal Minds

52: NCIS

53: Chicago PD

54: Food Wars

55: High School of the Dead

56: My Hero academia

57: Dead rising

58: Ikkitousen

59: Trinity seven

60: Seven Mortal Sins

61: That time I got reincarnated as a slime

62: Fairy Odd Parents.

63: Rwby.

64: Winx club.

65: Maleficent.

66: Descendants.

67: Cruella.

68: Once upon a time.

69: Dungeons and Dragons.

70: Mass Effect.

71: Star vs the Forces of Evil.

72: My little pony and Equestria Girls

73: Power puff girls Z.

74: Duck Dodgers.

75: Undertale

76: Resident Evil

77: Thunder Cats

78: miraculous lady bug and cat noir

79: Kingdom hearts

80: Samurai Jack

An: this a continuous chapter so if you have any shows that isn't adult swim then tell me.

81: Hazbin Hotel.

82: Helluva Boss.

83: Helltaker.

84: Fnaf

85: Bendy and the ink machine

86: The Adventures of Jimmy Neutron, Boy Genius.

87: Dexter's Laboratory

88: Harry Potter

89: Wander over yonder

90: Monster vs Aliens

91: Sonic X and Sonic the Hedgehog.

92: Ducktales 2017

93: Mario Bros

94: Black Clover

95: Metroid

96: Mysticons

97: Huntik: Secrets & Seekers

98: Slugterra

99: Lolirock

100: Max Steel

An: only 50 crossovers can be added

101: Fire Force

102: Amphibia

103: Owl House

104: American Dragon

105: Mega Man

106: Senran Kagura

107: Spawn

108: Asura's Wrath

109: Heaven's Lost Property

110: Tales of the Foundation (most dangerous scp won't be added)

111: Chaotic

112: Sofia the First

113: Elena of Avalor

114: the secret saturdays

115: Fallout

116: the Boys

117: Dragon Age

118: men in black

119: Invincible

120: Invader Zim

121: My life as a Teenage Robot

122: 6teen

123: Total Drama

124: Redakai

125: Monsuno

126: Devil may cry

127: Doom

128: Hot Wheels Battle Force.

129: Charmed

130: Class of the Titans

131: Blue Exorcist

132: Testament of a sister new devil

133: Regal Academy

134: Sweet Tooth

135: Sabrina

136: Supernatural Academy

137: Rush Zone Season of the guardians

138: Randy Cunningham 9th grade ninja

139: Jupiter Lee

140: Subnautica

141: Blazing Team

142: She Ra

143: The Deep

144: Kipo and the Age of Wonder beasts

145: Shimmer and Shine

146: Witch

147: Motorcity

148: Arcane

149: Overwatch

150: Trese

An: I decided to add fifty more since I decided to expand the chapters.

151: Oneshot

152: Buffy the vampire slayer

153: Percy Jackson

154: Mortal Instruments

155: Witchblade (anime)

156: vamperilla

157: Elfen Lied

158: Off (Game)

159: Tokyo ghoul

160: Yume Nikki

161: Gravity Rush

162: Our Last Crusade or the Rise of a New World aka KimiSen.

163: Jaws

164: Tremors

165: Predator

166: Meg

An: to everyone who familiar with the first generations of Kamen Rider I'm afraid I won't involve them since they came from Showa Era which involves the Post Japan war back in 1989.

167: Kamen Rider (Heisei Era and beyond only)

168: Small Soldiers

169: Prototype

170: Infamous

171: Dead Island

172: Walking Dead

173: Pretty cure

174: Golden Sun

175: Toriko

176: Cybersix

177: Fullmetal Alchemist

178: Inspector Gadget

179: Gadget Boy and Heather

180: Carmen Sandiego

181: Captain Planet

182: Cyberchase

183: Pirates of Dark Water

184: Dark Crystal age of resistance

185: Beetlejuice the series

186: Darkstalkers

187: Lost Planet

188: Gate

189: Touhou

190: Sengoku Koihime

191: Maneater

192: Rampage

193: Buzz Lightyear of Star Command

194: Cyberpunk

195: Assassin Creed

196: Watch Dog

197: Witcher

198: Grand Theft Auto

199: Tomb Raider

200: Final Fantasy