About 110, including Reimu's turtle and an unnamed catfish in one of the games.
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Touhou 1-5: PC-98 Touhou >6: Windows Spinoffs: Windows
On mac os x 10.6.8, I press shift, dunno about windows though
Internet.
You can download the games at various sites and forums, but I highly suggest you buy the game from a site like J-List. At Touhou Wikis you can find the English Patch for the games.
Although pirating is pretty popular amongst the Touhou community, most games would fall under $14 CAD and the spin-offs being $12.