If I remember well, it did alright for WiiU and for the usual DQX numbers. I don't remember how much (I'm sure someone has the numbers), but it should probably be close to 150-200k all extensions combined.
Famitsu
{2012.07.30 - 2013.12.29} [WII] Dragon Quest X: Mezameshi Itsutsu no Shuzoku Online # <RPG> (Square Enix) {2012.08.02} (¥6.648) - 420.311 / 664.802 <75,60%>
{2013.09.23 - 2013.12.29} [WII] Dragon Quest X: Mezameshi Itsutsu no Shuzoku Online [Bargain Edition] <RPG> (Square Enix) {2013.09.26} (¥3.800) - 858 / 6.682 <21,80%>
{2013.12.02 - 2014.03.30} [WII] Dragon Quest X: Nemureru Yuusha to Michibiki no Meiyuu Online <RPG> (Square Enix) {2013.12.05} (¥3.800) - 111.187 / 145.491 <86,00%>
{2014.08.04 - 2014.08.10} [WII] Dragon Quest X: All in One Package {Dragon Quest X: Mezameshi Itsutsu no Shuzoku Online \ Dragon Quest X: Nemureru Yuusha to Michibiki no Meiyuu Online} <RPG> (Square Enix) {2014.08.07} (¥4.800)
{2015.04.27 - 2015.06.28} [WII] Dragon Quest X: Inishie no Ryuu no Denshou Online <RPG> (Square Enix) {2015.04.30} (¥3.800) - 84.185 / 95.840 <80-100%>
Total - 912.815
{2013.03.25 - 2014.03.30} [WIU] Dragon Quest X: Mezameshi Itsutsu no Shuzoku Online # <RPG> (Square Enix) {2013.03.30} (¥6.648) - 36.454 / 82.021 <60,00%>
{2013.09.23 - 2014.03.30} [WIU] Dragon Quest X: Mezameshi Itsutsu no Shuzoku Online [Bargain Edition] <RPG> (Square Enix) {2013.09.26} (¥3.800) - 2.111 / 34.926 <16,70%>
{2013.12.02 - 2014.03.30} [WIU] Dragon Quest X: Nemureru Yuusha to Michibiki no Meiyuu Online <RPG> (Square Enix) {2013.12.05} (¥3.800) - 68.560 / 91.180 <85,50%>
{2014.08.04 - 2014.08.10} [WIU] Dragon Quest X: All in One Package {Dragon Quest X: Mezameshi Itsutsu no Shuzoku Online \ Dragon Quest X: Nemureru Yuusha to Michibiki no Meiyuu Online} <RPG> (Square Enix) {2014.08.07} (¥4.800) - 4.470 / 4.470 <20-40%>
{2015.04.27 - 2015.06.28} [WIU] Dragon Quest X: Inishie no Ryuu no Denshou Online <RPG> (Square Enix) {2015.04.30} (¥3.800) - 97.324 / 111.894 <80-100%>
{2015.11.30 - 2015.12.06} [WIU] Dragon Quest X: All in One Package {Dragon Quest X: Mezameshi Itsutsu no Shuzoku Online \ Dragon Quest X: Nemureru Yuusha to Michibiki no Meiyuu Online \ Dragon Quest X: Inishie no Ryuu no Denshou Online} <RPG> (Square Enix) {2015.12.03} (¥4.800) - 3.136 / 3.136 <20-40%>
Total - 327.627
{2014.09.01 - 2015.05.17} [3DS] Dragon Quest X Online <RPG> (Square Enix) {2014.09.04} (¥3.800) - 59.053 / 166.436 <80-100%>
Media Create
{2012.07.30 - 2013.12.29} [WII] Dragon Quest X: Mezameshi Itsutsu no Shuzoku Online # <RPG> (Square Enix) {2012.08.02} (¥6.648) - 367.148 / 666.565 <70,21%>
{2013.09.23 - 2014.12.28} [WII] Dragon Quest X: Mezameshi Itsutsu no Shuzoku Online [Bargain Edition] <RPG> (Square Enix) {2013.09.26} (¥3.800) - 935 / 18.689 <28,92%>
{2013.12.02 - 2014.12.28} [WII] Dragon Quest X: Nemureru Yuusha to Michibiki no Meiyuu Online <RPG> (Square Enix) {2013.12.05} (¥3.800) - 117.432 / 175.156 <78,76%>
{2014.08.04 - 2014.12.28} [WII] Dragon Quest X: All in One Package {Dragon Quest X: Mezameshi Itsutsu no Shuzoku Online \ Dragon Quest X: Nemureru Yuusha to Michibiki no Meiyuu Online} <RPG> (Square Enix) {2014.08.07} (¥4.800) - 862 / 6.342 <20,27%>
{2015.04.27 - 2015.05.03} [WII] Dragon Quest X: Inishie no Ryuu no Denshou Online <RPG> (Square Enix) {2015.04.30} (¥3.800)
Total - 866.752
{2013.03.25 - 2013.12.29} [WIU] Dragon Quest X: Mezameshi Itsutsu no Shuzoku Online # <RPG> (Square Enix) {2013.03.30} (¥6.648) - 33.302 / 82.882 <56,51%>
{2013.09.23 - 2014.12.28} [WIU] Dragon Quest X: Mezameshi Itsutsu no Shuzoku Online [Bargain Edition] <RPG> (Square Enix) {2013.09.26} (¥3.800) - 1.504 / 45.885 <19,30%>
{2013.12.02 - 2014.12.28} [WIU] Dragon Quest X: Nemureru Yuusha to Michibiki no Meiyuu Online <RPG> (Square Enix) {2013.12.05} (¥3.800) - 70.648 / 119.390 <75,36%>
{2014.08.04 - 2014.12.28} [WIU] Dragon Quest X: All in One Package {Dragon Quest X: Mezameshi Itsutsu no Shuzoku Online \ Dragon Quest X: Nemureru Yuusha to Michibiki no Meiyuu Online} <RPG> (Square Enix) {2014.08.07} (¥4.800) - 3.945 / 30.441 <43,22%>
{2015.04.27 - 2015.05.24} [WIU] Dragon Quest X: Inishie no Ryuu no Denshou Online <RPG> (Square Enix) {2015.04.30} (¥3.800) - 98.323 / 107.305
{2015.11.30 - 2015.12.06} [WIU] Dragon Quest X: All in One Package {Dragon Quest X: Mezameshi Itsutsu no Shuzoku Online \ Dragon Quest X: Nemureru Yuusha to Michibiki no Meiyuu Online \ Dragon Quest X: Inishie no Ryuu no Denshou Online} <RPG> (Square Enix) {2015.12.03} (¥4.800)
Total - 385.903
{2014.09.01 - 2014.12.28} [3DS] Dragon Quest X Online <RPG> (Square Enix) {2014.09.04} (¥3.800) - 52.375 / 133.105 <95,53%>