There are 235 cards you can encounter in this game and here is a list showing them all! (Listed by which pack they are in)
Sacred Servant Enne 096
Red Monolith 097
Sacred Servant Sui 098
Blue Monolith 099
Sacred Servant Moku 100
Green Monolith 101
Gold Monolith 102
Sacred Servant Koh 103
Sacred Servant Ann 104
Black Monolith 105
Frau 106
Morpher Dryad 107
Incense Magic Kara 108
Salamander 109
Undine 110
Gnome 111
Cerberus 112
Nova 113
Medousa 114
Large Angel Plumage 115
Persephone 116
Commander Belial 117
Beast Leader Vasago 118
Athena 119
Poseidon 120
Ares 121
Typhon 122
Apollon 123
Hades 124
Zeus 125
Thunderbird 126
Evil Hawk 127
Flower Knight 128
Nightmare 129
Hellhound 130
Phantom Ship 131
Gold Whale 132
Shelleye 133
Sphinx 134
Wind Queen Eisha 135
Beserker 136
Skull Master Nebiros 137
Power Antares 138
Death Cancer 139
Dominions Vega 140
Giant Tarantula 141
Virtue Spica 142
Angel Teresa 143
Fallen Angel Benetnash 144
Anubis 145
Grimoire 146
Seraph Deneb 147
Astaroth 148
Valkyrie 149
Wraith Leeds Murphey 150
Leviathan 151
Thor 152
Imperfect 153
Odin 154
Demon King Zekio 155
Dragonslayer Balmung 156
Leraje's Magic Bow 157
Djinn's Lamp 158
Shazzan's Lamp 159
Fire Puppet 160
Aqua Hunter 161
Ice Puppet 162
Forest Puppet 163
Forest Hunter 164
Angel Puppet 165
Dark Puppet 166
Fire God Warrior 167
Weaponsmith Koto 168
Water God Warrior 169
Puppetmistress Lica 170
Forest God Warrior 171
Puppetman Hero 172
Molten Demon King 173
Paladin Holy Rapier 174
Doomsday Clock Fin 175
Gohen Ultra 176
Machine Emperor Knog 177
Gigantic Golem 178
Giant Ouroboros 179
Neo Beast Ilizion 180
Firedragon Muspelheim 181
Abyss Dragon Blue Mist 182
Fortdragon Yggdrasil 183
Lightdragon Valhalla 184
Battledragon Helheim 185
Ifrin 186
Flaming Phoenix 187
Yamainu 188
Skeleton Knight 189
Kappa 190
Ruby Knight 191
Sapphire Knight 192
Goblin Knight 193
Kyubi 194
Spirit Master Akiro 195
Samurai 197
Lightning Jellyfish 198
Ninja 199
Fairy Alchemist 200
Great Mage Datoh 201
Black Witch Pheena 202
Battle Knight 203
Paladin 204
Armored Stag Beetle 205
Guardian 206
Cyclops 207
Dragon Rider 208
Gladiator 209
Aquess 210
Dragon Hunter 211
Behemoth 212
Ogre 213
Shen Long 214
Dragon Zombie 215
Judgement 2??
??? 216
Lost Lady 217
??? 218
??? 219
EX Chimera 220
??? 221
??? 222
??? 223
??? 224
??? 225
??? 226
Grand Titan Jupiter 227
Fire God Tashin 228
Water God Lyza 229
Forest God Daike 230
Sky God Hadder 231
Ruin God Lighan 232
??? 233
??? 234
Creation God Aflecca 235