Lets take the case of SE
DS
1 2005-03-24 Egg Monster Hero
2 2005-12-01 Dragon Quest Heroes: Rocket Slime
3 2006-03-02 Children of Mana
4 2006-08-24 Final Fantasy III
5 2006-12-14 Final Fantasy Fables: Chocobo Tales
6 2006-12-28 Dragon Quest Monsters: Joker
7 2007-03-08 Heroes of Mana
8 2007-03-22 Front Mission
9 2007-04-26 Final Fantasy XII: Revenant Wings
10 2007-06-21 Itadaki Street DS
11 2007-07-27 Subarashiki Kono Sekai: It's a Wonderful World
12 2007-08-23 Final Fantasy Crystal Chronicles: Ring of Fate
13 2007-10-25 Final Fantasy Tactics A2: The Sealed Grimoire
14 2007-11-22 Dragon Quest IV
15 2007-12-20 Final Fantasy IV
16 2008-04-17 DS Bookkeeping, Level 3
17 2008-05-29 Front Mission 2089: Border of Madness
18 2008-07-03 Nanashi no Game (The Game with no Name)
19 2008-07-17 Dragon Quest V
20 2008-08-21 Sigma Harmonics
21 2008-10-23 Dragon Quest Monsters: Joker (Ultimate Hits)
22 2008-10-23 Final Fantasy III (Ultimate Hits)
23 2008-10-23 Dragon Quest Heroes: Rocket Slime (Ultimate Hits)
24 2008-10-23 Final Fantasy XII: Revenant Wings (Ultimate Hits)
25 2008-10-30 Cid and Chocobo's Mystery Dungeon: The Labyrinth of Lost Time DS+
26 2008-11-01 Valkyrie Profile: The Accused One
27 2008-11-06 Pingu no Waku Waku Carnival!
28 2008-11-20 Chrono Trigger
29 2008-12-11 Chocobo to Mahou no Ehon: Majo to Shoujo to Go-nin no Yuusha
PSP
1 2006-03-02 Valkyrie Profile: Lenneth
2 2006-05-25 Dragon Quest & Final Fantasy in Itadaki Street Portable
3 2007-04-19 Final Fantasy Anniversary Edition
4 2007-05-10 Final Fantasy Tactics: The War of the Lions
5 2007-06-07 Final Fantasy II Anniversary Edition
6 2007-09-13 Crisis Core: Final Fantasy VII
7 2007-12-27 Star Ocean 1 First Departure
8 2008-03-06 Dragon Quest & Final Fantasy in Itadaki Street Portable (Ultimate Hits)
9 2008-03-06 Valkyrie Profile: Lenneth (Ultimate Hits)
10 2008-04-02 Star Ocean: Second Evolution
11 2008-12-18 Dissidia: Final Fantasy
12 2009-07-30 Crisis Core: Final Fantasy VII Ultimate Hits
13 2009-07-30 Final Fantasy II: Anniversary Edition Ultimate Hits
14 2009-07-30 Final Fantasy Tactics: The War of the Lions Ultimate Hits
15 2009-07-30 Final Fantasy: Anniversary Edition Ultimate Hits
16 2009-11-01 Dissidia: Final Fantasy - Universal Tuning
17 2009-12-03 Star Ocean: The Second Story (Ultimate Hits)
And now 3DS (SE Vita support is non existent)
1 2011-02-26 Bust-A-Move Universe
2 2011-11-02 Dragon Quest: Slime Morimori 3
3 2012-02-16 Theatrhythm Final Fantasy
4 2012-03-29 Kingdom Hearts 3D Dream Drop Distance
5 2012-05-31 Dragon Quest Monsters: Terry's Wonderland 3D
6 2012-10-11 Bravely Default: Flying Fairy
7 2013-02-07 Dragon Quest VII: Fighters of Eden
8 2013-06-13 Gyrozetter: Wings of the Albatross
9 2014-02-06 Dragon Quest Monsters 2: Iru and Luca's Marvelous Mysterious Key
10 2014-04-24 Theatrhythm Final Fantasy: Curtain Call
11 2014 FF Explorers
All in the same time frame of 3 years.
Your PSP one is four years. Also both the DS and PSP lists are loaded with reprints.
edit: Here they are corrected. 3 years, minus budget reprints.
DS
1 2005-03-24 Egg Monster Hero
2 2005-12-01 Dragon Quest Heroes: Rocket Slime
3 2006-03-02 Children of Mana
4 2006-08-24 Final Fantasy III
5 2006-12-14 Final Fantasy Fables: Chocobo Tales
6 2006-12-28 Dragon Quest Monsters: Joker
7 2007-03-08 Heroes of Mana
8 2007-03-22 Front Mission
9 2007-04-26 Final Fantasy XII: Revenant Wings
10 2007-06-21 Itadaki Street DS
11 2007-07-27 Subarashiki Kono Sekai: It's a Wonderful World
12 2007-08-23 Final Fantasy Crystal Chronicles: Ring of Fate
13 2007-10-25 Final Fantasy Tactics A2: The Sealed Grimoire
14 2007-11-22 Dragon Quest IV
15 2007-12-20 Final Fantasy IV
16 2008-04-17 DS Bookkeeping, Level 3
17 2008-05-29 Front Mission 2089: Border of Madness
18 2008-07-03 Nanashi no Game (The Game with no Name)
19 2008-07-17 Dragon Quest V
20 2008-08-21 Sigma Harmonics
21 2008-10-30 Cid and Chocobo's Mystery Dungeon: The Labyrinth of Lost Time DS+
22 2008-11-01 Valkyrie Profile: The Accused One
23 2008-11-06 Pingu no Waku Waku Carnival!
24 2008-11-20 Chrono Trigger
25 2008-12-11 Chocobo to Mahou no Ehon: Majo to Shoujo to Go-nin no Yuusha
PSP
1 2006-03-02 Valkyrie Profile: Lenneth
2 2006-05-25 Dragon Quest & Final Fantasy in Itadaki Street Portable
3 2007-04-19 Final Fantasy Anniversary Edition
4 2007-05-10 Final Fantasy Tactics: The War of the Lions
5 2007-06-07 Final Fantasy II Anniversary Edition
6 2007-09-13 Crisis Core: Final Fantasy VII
7 2007-12-27 Star Ocean 1 First Departure
8 2008-04-02 Star Ocean: Second Evolution
9 2008-12-18 Dissidia: Final Fantasy
3DS
1 2011-02-26 Bust-A-Move Universe
2 2011-11-02 Dragon Quest: Slime Morimori 3
3 2012-02-16 Theatrhythm Final Fantasy
4 2012-03-29 Kingdom Hearts 3D Dream Drop Distance
5 2012-05-31 Dragon Quest Monsters: Terry's Wonderland 3D
6 2012-10-11 Bravely Default: Flying Fairy
7 2013-02-07 Dragon Quest VII: Fighters of Eden
8 2013-06-13 Gyrozetter: Wings of the Albatross
9 2014-02-06 Dragon Quest Monsters 2: Iru and Luca's Marvelous Mysterious Key
10 2014-04-24 Theatrhythm Final Fantasy: Curtain Call