Which platforms can the most Final Fantasy games be found?

I'm interested in (re)playing as many of the Final Fantasy games as I possibly can, but I'm limited in the number of various platforms I have access to (what I have access to isn't important - I don't mind picking up a new console or something, but I don't want to have to buy 5 different consoles). What platform(s) currently support the most number of Final Fantasy games?

The term "Final Fantasy game" specifically refers to the primary core of games which are titled as "Final Fantasy n". However, answers may include sequels and derivatives such as Final Fantasy Tactics and Kingdom Hearts as either a separate section or as a dedicated answer. Also, emulators could also be considered if there is a readily-available legal source of ROMs for that platform.

Solution 1:

The console with most FF games is playstation. (anthology, Chronicles, origin) have more than 1 FF game from NES/SNES.

If counting digital downloads, then the PS3 is the console with the most FF games.

Gameboy

Final Fantasy: Legend I
Final Fantasy: Legend II    
Final Fantasy: Legend III
Final Fantasy Adventure

Gameboy Advance

Final Fantasy IV Advance    
Final Fantasy V Advance 
Final Fantasy VI Advance        
Final Fantasy Tactics Advance       
Final Fantasy: Dawn of Souls    

Gamecube

Final Fantasy Crystal Chronicles

iOS, Android

Final Fantasy I
Final Fantasy II
Final Fantasy IV
Final Fantasy V
Final Fantasy VI
Final Fantasy Tactics
Final Fantasy Dimensions
Final Fantasy All the Bravest
Final Fantasy Record Keeper

Mobile Phone

Before Crisis: Final Fantasy VII        
Crisis Core: Final Fantasy VII
Final Fantasy IV: The After Years

Nintendo (NES)

Final Fantasy I     
Final Fantasy II    
Final Fantasy III   

Nintendo 3ds

Theatrhythm Final Fantasy   Nintendo 3DS    

Nintendo DS

FF Crystal Chronicles: Ring of Fates    
FF Tactics A2: Grimoire of the Rift 
Final Fantasy III DS    
Final Fantasy IV DS
Final Fantasy XII: Revenant Wings   
Final Fantasy: The 4 Heroes of Light
FF Crystal Chronicles: Echoes of Time

Playstation

Final Fantasy VII       
Final Fantasy VIII      
Final Fantasy IX        
Final Fantasy Tactics       
Final Fantasy: Anthology        
Final Fantasy: Chronicles       
Final Fantasy: Origins  

Playstation 2

Final Fantasy X     
Final Fantasy XII   
Final Fantasy X-2   
Dirge of Cerberus: Final Fantasy VII
Final Fantasy XI

PC

Final Fantasy III
Final Fantasy IV
Final Fantasy VII
Final Fantasy VIII
Final Fantasy XI
Final Fantasy XIII
Final Fantasy XIII-2
Final Fantasy XIV

Xbox 360

Final Fantasy XI
Final Fantasy XIII
Final Fantasy XIII-2
Lightning Returns: Final Fantasy XIII

Playstation 3

Final Fantasy XI    
Final Fantasy XIV (Realm Reborn)    
Final Fantasy XIII  
Final Fantasy XIII-2        
Lightning Returns: Final Fantasy XIII   
-----PSN-----
Final Fantasy I
Final Fantasy II
Final Fantasy Origins
Final Fantasy IV
Final Fantasy V
Final Fantasy VI
Final Fantasy VII
Final Fantasy VIII
Final Fnatasy IX
Final Fantasy X-X2
Final Fantasy XII-2
Final Fantasy Tactics
Crystal Defenders

Playstation 4

Final Fantasy XIV (Realm Reborn)
Final Fantasy XV
The Reason Final Fantasy Type-0
Final Fantasy X-X2 HD
-----PSN-----
Final Fantasy I
Final Fantasy II
Final Fantasy Origins
Final Fantasy IV
Final Fantasy V
Final Fantasy VI
Final Fantasy VII
Final Fantasy VIII
Final Fnatasy IX
Final Fantasy X-X2
Final Fantasy XII-2
Final Fantasy Tactics
Crystal Defenders

Playstation Portable (PSP)

Final Fantasy Tactics: War of the Lions 
Final Fantasy IV: The Complete Collection   
Dissidia Final Fantasy      
Final Fantasy Type-0        
Dissidia 012 Final Fantasy  
Final Fantasy Anniversary Edition   
Final Fantasy II Anniversary Edition
Final Fantasy IV: The After Years   
----PSN---
Final Fantasy I
Final Fantasy II
Final Fantasy Origins
Final Fantasy III
Final Fantasy IV
Final Fantasy V
Final Fantasy VI
Final Fantasy VII
Final Fantasy VIII
Final Fantasy IX

Super Nintendo (SNES)

Final Fantasy IV        
Final Fantasy V 
Final Fantasy VI        
Final Fantasy: Mystic Quest 

Wii

FF Crystal Chronicles: The Crystal Bearers      
FF Crystal Chronicles: My Life as a King    
FF Crystal Chronicles: My Life as a Darklord
Final Fantasy IV: The After Years   
FF Crystal Chronicles: Echoes of Time   

got this from: http://www.thefinalfantasy.com/games/

and: http://finalfantasy.wikia.com/wiki/PlayStation_Network

I just made it look nice.

Solution 2:

A PS3 can play at least every Final Fantasy from I to XIII-3 except for III and XII.

With backwards compatibility and PSClassics on PSN you can play:

Final Fantasy Origins - (Contains FFI and FFII)
Final Fantasy Chronicles - (Contains FFIV and Chrono Trigger)
Final Fantasy Anthology - (Contains FFV and FFVI)
Final Fantasy VII through IX

PS3 versions include X, X-2, XIII, XIII-2, and XIII Lighting Returns.

An original PS3 COULD have played XII. But the PS2 backwards compatibility which was discontinued early on.